A Comprehensive Guide to Probiotic and Fermented Foods of Sikkim

Sikkim, a state in Northeast India, is nestled in the Eastern Himalayas. It is home to a diverse population of ethnic communities, including the Lepcha (the original inhabitants), Bhutia, Nepali (including Brahmin, Chhetri, Rai, Limbu, Tamang, Gurung, Magar, and Sherpa subgroups), and others, each contributing to a uniquely rich culinary heritage. Fermented foods are an intrinsic part of the traditional diet across all these communities, consumed daily as condiments, side dishes, soups, pickles, and beverages. These foods are valued not only for their distinct flavors and aromas but also for their probiotic benefits, improved digestibility, and enhanced nutritional profiles, including higher levels of vitamins, essential amino acids, and bioactive peptides.

Sikkim holds a special place in the scientific study of fermented foods. Researchers have extensively documented the microbiology of Sikkimese ferments, isolating and characterizing numerous probiotic strains. The state is perhaps best known globally for the fermented soybean product kinema. In 2022, Kinema was accorded the Geographical Indication (GI) tag for Sikkim, recognizing its unique origin and traditional production methods.

Scientific studies have isolated and identified several probiotic lactic acid bacteria (LAB) and Bacillus species from Sikkim's fermented foods. These include Bacillus subtilis, Lactobacillus plantarum, Lactobacillus brevis, Lactococcus lactis, Pediococcus pentosaceus, and various yeasts. Many of these isolates have demonstrated promising antimicrobial activity, bile salt hydrolase capabilities, cholesterol lowering potential, and survival under simulated gastrointestinal conditions.

This document organizes the major fermented foods of Sikkim by substrate type: fermented soybean products, fermented vegetable products, fermented dairy products, fermented meat and fish products, and fermented beverages with their starter cultures.

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Part 1: Fermented Soybean Products

Soybean fermentation is a cornerstone of Sikkimese cuisine, particularly among the Nepali communities. These products are alkaline, sticky, and pungent, produced by Bacillus subtilis fermentation. A unique advantage of this bacterium is that it forms heat resistant endospores, which survive cooking, meaning even cooked dishes containing kinema retain probiotic potential.

Kinema

Kinema is the most important and widely consumed fermented food of Sikkim, often considered the state's signature fermented product. In 2022, Kinema was granted the Geographical Indication (GI) tag for Sikkim. The name kinema is derived from the Nepali language, where "kinema" means "fermented flavor." Small, locally grown, yellow or black seeded soybeans are collected, cleaned, and soaked overnight. They are then boiled for approximately 30 minutes until soft, and the excess water is drained away. The cooked soybeans are lightly crushed (traditionally using a wooden pestle or between stones), wrapped in fresh fern leaves (Diplazium esculentum, locally known as niuro), fig leaves, or banana leaves, or placed in a perforated polythene bag. The package is left to ferment near a fireplace or at room temperature for two to three days. The appearance of a sticky, white, slimy coating with a strong, pungent, ammonia like smell indicates that the kinema is ready. The optimal fermentation conditions are 35 to 40°C for 24 to 48 hours.

Kinema is a protein rich product containing about 43 to 48% protein on a dry matter basis. The fermentation process is driven primarily by Bacillus subtilis, with populations reaching 10^8 to 10^9 cfu/g. Enterococcus faecium occurs in all kinema samples, along with yeasts like Candida parapsilosis and Geotrichum candidum in some samples. Kinema also contains free amino acids, including all essential amino acids, and has increased levels of vitamins, particularly the B complex (riboflavin, niacin, pyridoxine, and cobalamin). Fermentation reduces antinutritional factors such as trypsin inhibitors, phytic acid, and flatulence causing oligosaccharides, making the product more digestible than unfermented soybeans.

Kinema is typically prepared as a thick curry. It is first dry roasted or fried until the sticky texture is reduced and the product becomes crumbly (a process called bhuteko kinema), then cooked with onions, tomatoes, chilies, ginger, garlic, and spices such as turmeric and cumin. It serves as a meat substitute, particularly for vegetarian households. Kinema is also used in soups (kinema ko jhol), as a side dish with rice, and as a flavor enhancer in vegetable curries. Some households also make kinema ko achar (pickle) by mixing fried kinema with mustard oil, roasted chili powder, and fermented leafy greens.

Note on Variants: Kinema is essentially the same product as Hawaijar of Manipur, Bekang of the Mizo, and Tungrymbai of Meghalaya. The primary differences lie in the specific plant leaves used for wrapping, the crushing method (light crushing for kinema, more thorough for some others), and the exact fermentation duration.

Bhatmas ki Gundruk (Fermented Soybean with Leafy Greens)

Bhatmas ki gundruk is a unique Sikkimese product that combines fermented soybeans with fermented leafy greens. Whole soybeans are cooked, lightly crushed, and mixed with wilted mustard or radish leaves. The mixture is packed tightly into an earthen pot and sealed airtight. Fermentation proceeds for five to seven days, after which the product is sun dried. The resulting product has a complex flavor profile that combines the pungency of kinema with the sourness of gundruk. It is used similarly to kinema, as a curry base or soup ingredient. The dual fermentation involves both Bacillus subtilis (from the soybeans) and lactic acid bacteria (from the leaves), creating a unique microbial consortium. This product is particularly valued in remote areas where transportation of separate fermented products is difficult.

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Part 2: Fermented Vegetable Products

Sikkim has an exceptionally rich tradition of lactic acid fermented vegetables. These are predominantly spontaneous fermentations, relying entirely on naturally occurring lactic acid bacteria without the use of a starter culture. The cool, temperate climate of Sikkim is particularly conducive to controlled lactic acid fermentation. Many products are sun dried after fermentation for long term storage, allowing year round availability.

Gundruk

Gundruk is the most important and widely consumed fermented vegetable product of Sikkim, as in Nepal. It is made from the leaves of mustard (Brassica juncea), radish (Raphanus sativus), cauliflower, cabbage, or a mixture thereof. The fresh leaves are wilted in the sun for one to two days, then chopped and tightly packed into an earthen pot or bamboo basket. The container is sealed airtight with leaves, mud, or polythene and left to ferment for 7 to 15 days. After fermentation, the sour product is removed and sun dried until crisp. Gundruk can be stored for up to one year in a dry place. It is typically eaten as a soup (gundruk ko jhol), fried as a side dish with potatoes or eggs, or used as a pickle. The fermentation is dominated by Lactobacillus plantarum, Lactobacillus brevis, Lactobacillus fermentum, Pediococcus pentosaceus, and Leuconostoc fallax. The pH of fermented gundruk drops from approximately 6.5 to below 4.0. The product is rich in minerals (particularly calcium, iron, and potassium) and dietary fiber. The fermentation process reduces glucosinolate content, which can be antinutritional when present in high amounts in raw brassica leaves. Annual production of gundruk in Sikkim is estimated to be several hundred tons, with significant quantities traded in local markets.

Sinki

Sinki is a fermented and dried radish taproot product, similar in principle to gundruk but specifically made from radish (Raphanus sativus). It is particularly popular in the colder regions of Sikkim, including Lachung, Lachen, and the Dzongu Valley. Fresh radish taproots are washed, cut into pieces, and wilted in the sun for one to two days. The pieces are then tightly packed into an earthen pot or bamboo basket and sealed airtight. Fermentation proceeds for 10 to 15 days, after which the sour fermented radish is sun dried. Sinki has a sharp, sour, and slightly pungent flavor. It is used in soups, pickles, and as a side dish. The dominant microorganism in sinki is Lactobacillus plantarum, which appears later in the fermentation process and produces the majority of the lactic acid, leading to a drop in pH from approximately 6.7 to 3.3. Lactobacillus brevis and Lactobacillus fermentum also play roles in the early stages. Sinki is particularly valued in the mountainous regions of northern Sikkim where fresh vegetables are scarce during winter months. The product is known to have a longer shelf life than gundruk, sometimes exceeding 18 months when properly dried and stored.

Mesu (Fermented Bamboo Shoot)

Mesu is a fermented young bamboo shoot product, consumed widely in Sikkim, particularly among the Lepcha, Bhutia, and Nepali communities. Tender, edible bamboo shoots (various species, including Dendrocalamus hamiltonii and Bambusa tulda) are sliced into thin shreds or small pieces. These are tightly packed into a bamboo cylinder (typically with a tight fitting bamboo lid) or a glass jar and sealed airtight. No water, salt, or starter is added. The shoots are left to ferment at room temperature for 7 to 15 days, developing a characteristic sour taste and slightly pungent aroma. Mesu is eaten as a pickle, often with chili, salt, and turmeric, or used as a vegetable in curries. Some Sikkimese communities also dry mesu after fermentation for longer storage. The fermentation is driven by various species of lactic acid bacteria, including Lactobacillus plantarum, Lactobacillus brevis, and Leuconostoc fallax. Unlike the Manipuri Soibum, which ferments for 9 to 12 months, mesu is a short term fermentation product consumed relatively soon after preparation. Mesu is particularly abundant in Sikkim during the monsoon season (June to September) when bamboo shoots are readily available from the forests.

Khalpi

Khalpi is a fermented cucumber pickle, popular in the hilly regions of Sikkim, particularly in the southern and eastern districts. Young, tender cucumbers are cut into pieces and mixed with salt, chili powder, turmeric, and mustard oil. The mixture is tightly packed into a glass jar or earthen pot and fermented at room temperature for three to five days. The resulting product is sour and spicy, eaten as a side dish or condiment with rice, dhal, or meat curries. Unlike gundruk and sinki, khalpi is typically consumed fresh rather than dried, and has a shorter shelf life of two to three weeks when refrigerated. The primary microorganisms involved are Lactobacillus plantarum, Lactobacillus brevis, and Leuconostoc mesenteroides. The mustard oil contributes antimicrobial properties (due to allyl isothiocyanate) and helps to control unwanted microbes during the short fermentation period. Some Sikkimese variations add fresh ginger slices, garlic, or fenugreek seeds to the pickle.

Torani

Torani is the sour liquid byproduct obtained during the preparation of gundruk and sinki. After the leafy vegetables or radish pieces have fermented, the expressed liquid (torani) is collected and used as a souring agent in curries, soups, and pickles. It functions as a natural, fermented alternative to tamarind or lemon juice. Torani itself is a rich source of lactic acid bacteria (up to 10^8 cfu/ml) and organic acids (primarily lactic and acetic acid). Some Sikkimese households intentionally produce torani as a separate product by fermenting crushed leaves with a small amount of water in a sealed container for 5 to 7 days, then straining the liquid. Torani is also consumed as a refreshing sour drink, sometimes diluted with water and mixed with roasted cumin powder and salt. The product is particularly valued in the summer months as a digestive aid and rehydration beverage.

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Part 3: Fermented Dairy Products

Sikkim has a strong tradition of pastoralism, particularly among the Lepcha, Bhutia, and Sherpa communities of the higher altitudes (above 2,500 meters). The state is home to significant populations of yak (Bos grunniens) and chauri (a yak-cow hybrid), whose milk is used to produce distinctive fermented dairy products.

Chhurpi (Hard and Soft Varieties)

Chhurpi is a traditional fermented cheese product, made by the Lepcha, Bhutia, Sherpa, and Nepali communities across Sikkim, particularly in the northern districts of Mangan and Gyalshing. There are two main varieties: soft chhurpi and hard chhurpi.

Soft chhurpi is a fresh, soft cheese made by fermenting boiled milk (yak, chauri, cow, or a mixture) with a starter from a previous batch. The curds are collected in a muslin cloth, hung to drain excess whey for 12 to 24 hours, and pressed lightly. The resulting soft mass has a moisture content of approximately 30 to 40% and a mild, slightly sour taste. Soft chhurpi is used as a condiment, eaten with green vegetables as a savory dish, used as a filling for momos, ground with tomatoes and chilies for chutney, or made into a refreshing soup (chhurpi ko jhol).

Hard chhurpi is produced by taking the soft chhurpi curds and pressing them very firmly, sometimes for several days under heavy stones, to expel almost all moisture. The pressed cheese is then cut into blocks (approximately 5 cm by 5 cm) and hung in a smoky kitchen, dried in the sun, or stored in a warm, dry place for several weeks to several months. The final product is extremely hard (moisture content below 10%), with a dense, layered, almost ceramic texture. Hard chhurpi is used as a masticatory (chewing item) and is considered both nutritious and a palate cleanser. A single small piece (2 to 3 cm square) can be chewed for several hours, similar to gum. It is often given to children as a snack or carried by yak herders and travelers as a durable, long lasting source of protein that does not require refrigeration.

Studies have isolated Lactobacillus plantarum, Lactiplantibacillus plantarum, Lactococcus lactis, Pediococcus pentosaceus, and Leuconostoc mesenteroides from chhurpi. These isolates have demonstrated significant probiotic properties, including survival under simulated gastrointestinal conditions (pH 2.0 for up to 3 hours, followed by 0.3% bile salts for 2 hours), auto aggregation capacity (30 to 40% after 5 hours), bile salt hydrolase activity (important for cholesterol metabolism), and antimicrobial activity against common pathogens including Escherichia coli, Staphylococcus aureus, and Salmonella typhi. The smoky environment used in hard chhurpi production also imparts characteristic phenolic compounds (including guaiacol and cresols) with additional antimicrobial properties. Chhurpi is particularly rich in calcium, with a 100g serving (approximately 10 small cubes) providing over 150% of the daily recommended intake. The product is also a source of bioactive peptides, some of which have shown angiotensin converting enzyme (ACE) inhibitory activity in laboratory studies, suggesting potential blood pressure lowering effects.

Mohi

Mohi is a fermented buttermilk product, traditionally produced after churning butter from curd (dahi). Fresh dahi is churned, typically using a wooden churner (theki) made from the wood of the Himalayan rhododendron or walnut tree, to separate butter (nuni). The remaining liquid is mohi. Mohi has a thin, watery consistency and a sour, refreshing taste. It is consumed as a beverage, often mixed with salt, roasted cumin powder, and fresh coriander. Mohi is also used as a base for soups, as a marinade for meat (where the acid tenderizes the protein), and as a starter for some vegetable ferments. The microbial population of mohi includes Lactococcus lactis, Leuconostoc citreum, and various Lactobacillus species at concentrations of 10^6 to 10^8 cfu/ml. Mohi is considered a digestive aid and is traditionally consumed after heavy or rich meals, particularly during festivals. The product is a rich source of probiotics, B vitamins (especially riboflavin and B12), and calcium. Unlike commercial buttermilk, traditional mohi is not pasteurized and contains live, diverse bacterial populations. Mohi can be stored at room temperature for 24 to 48 hours, after which it becomes excessively sour; refrigeration extends its shelf life to 7 to 10 days.

Dahi (Curd)

Dahi is the Sikkimese equivalent of yogurt, produced by fermenting boiled and cooled milk with a starter culture from a previous batch. The starter contains Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus, along with other mesophilic LAB including Lactococcus lactis and Leuconostoc species. The fermentation is typically carried out in an earthen pot (hando), which maintains a stable temperature due to its porous nature and allows slow evaporation, resulting in a thicker consistency. Sikkimese dahi is traditionally set in the evening (using milk boiled and cooled to approximately 40°C) and ready by the following morning. Unlike commercial yogurt, traditional dahi has a thinner consistency than Greek yogurt but thicker than industrial varieties, a varied tartness depending on the ambient temperature (slightly more sour in summer, milder in winter), and a higher diversity of LAB. Dahi is consumed daily in many Sikkimese households as a side dish with rice (dahi bhat), as a dessert mixed with sugar or jaggery and sometimes topped with roasted millet flour, or as a base for the popular beverage lassi (blended with water, sugar, and sometimes fruit). Dahi is also an essential component of many religious offerings and rituals across all Sikkimese communities, including the Lepcha, Bhutia, and Nepali. The product is considered cooling in traditional medicine and is often recommended during summer months or for individuals with digestive heat (pitta imbalance in Ayurvedic terms). The dahi of Sikkim is noted for its distinct flavor, attributed to the unique microbial flora present in the local environment and the diet of the region's livestock, which graze on high altitude grasses and herbs.

Gheu (Traditional Clarified Butter)

Gheu (ghee) is clarified butter produced from the milk of yak, chauri, or cows in Sikkim. Unlike industrially produced ghee, which is often made from cream, Sikkimese gheu is traditionally made from mohi or dahi. The process involves gently heating mohi or churned dahi to evaporate water and separate the milk solids, which are then filtered out. The resulting gheu has a distinct, nutty, and complex flavor profile. For high altitude storage, some Sikkimese communities, particularly the Lachenpas and Lachungpas of North Sikkim, produce aged gheu (sometimes called khoa gheu). The gheu is stored for months or even years in airtight earthen pots or animal stomach bladders. Over time, the gheu undergoes slow, lipid mediated fermentation and oxidation, developing a complex, pungent, almost cheese like aroma. This aged gheu is highly prized and commands a premium price, often used only for special guests or religious ceremonies. While gheu itself is primarily fat, the long aging process in traditional vessels allows for the presence of bioactive compounds and small amounts of lipophilic microbial metabolites from the original dahi. Some studies have documented the presence of specific yeasts (including Debaryomyces and Pichia species) and bacteria (including Lactobacillus and Bifidobacterium) in aged gheu, though the low water activity (below 0.6) limits active microbial growth. Aged gheu is used as a condiment, cooking medium, and traditional medicine for wound healing, respiratory ailments, and as a rejuvenative (rasayana) in Tibetan medicine (Sowa Rigpa), which is practiced in Sikkim's Buddhist monasteries.

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Part 4: Fermented Meat and Fish Products

Sikkim has several traditional preserved meat and fish products, though their production has declined in recent decades due to changing lifestyles, religious influences (particularly the growth of vegetarianism among some Hindu communities), and conservation concerns. These products are now primarily confined to specific ethnic groups and remote areas.

Sukuti

Sukuti is a dried and sometimes smoked meat product, consumed across Sikkim, particularly among the Lepcha, Sherpa, and Nepali (non Brahmin) communities. Lean meat from water buffalo, beef (among non Hindu communities and some Buddhist groups), goat, or lamb is cut into thin strips (approximately 2 cm wide and 10 cm long), marinated with salt, turmeric, chili, ginger, garlic, and other spices, and then hung to dry in the sun or near a fireplace for several days to weeks. In the high altitude regions of North Sikkim (Mangan district), the cold, dry air naturally desiccates the meat over several weeks. The product undergoes some surface microbial fermentation during the slow drying process, particularly if hung in a traditional kitchen environment where smoke from the fireplace (using rhododendron or oak wood) and ambient microbes contribute to the flavor profile. Sukuti is typically rehydrated (by boiling or soaking) and fried as a side dish with onions and chili, added to soups, or used as a filling for momos. It is also consumed as a snack, often beaten and shredded into a form called sukuti ko sadeko, mixed with raw onions, green chilies, cilantro, and lemon juice. The production of sukuti is a significant source of income for some rural households in South and West Sikkim, with estimates suggesting over 50 tons produced annually in the state. However, production has decreased in recent years due to stricter enforcement of animal slaughter laws and the availability of cheaper, factory processed meat alternatives.

Sidhra (Fermented Fish)

Sidhra is a fermented and sun dried fish product, prepared primarily by the Lepcha and Bhutia communities of Sikkim, particularly those living near the Teesta River and its tributaries. Small freshwater fish (mainly Puntius species, locally known as chunge nga or tite nga, along with Barilius and Schizothorax species) are cleaned, sun dried for one to two days, then packed tightly into an earthen pot. The pot is sealed (often with a paste of mud and leaves) and left to ferment for 15 to 30 days at room temperature. After fermentation, the fish are sun dried again until completely dry. Sidhra has a strong, pungent odor (often compared to Ngari of Manipur) and a distinctive, savory flavor. It is used as a condiment or side dish, often fried and eaten with rice. Sidhra is also ground into a paste and used as a flavoring agent in vegetable curries. The fermentation is driven by naturally occurring lactic acid bacteria and halophilic microbes, though the product is traditionally made without added salt. The microbial community includes Lactobacillus plantarum, Lactobacillus brevis, Pediococcus pentosaceus, and in some samples, the yeast Candida ciferrii. Sidhra has a high protein content (approximately 50 to 55% on a dry weight basis) and provides a source of calcium from the small, edible bones. The population of riverine fish in Sikkim has declined significantly in recent decades due to hydropower projects, river pollution, and overfishing, so production of sidhra is now largely confined to a few remote areas, particularly the Dzongu Valley (a Lepcha reserved area) and parts of East Sikkim. Sidhra is rarely seen in local markets today, primarily prepared for household consumption.

Gnuchi (also known as Kochila in some regions)

Gnuchi is a traditional fermented meat product of the Kathmandu Valley Newar community, and its preparation is occasionally found among the Newar diaspora in Sikkim (particularly in Gangtok and Namchi). It is made from the internal organs, particularly the small intestines, of water buffalo. The intestines are thoroughly cleaned, boiled, chopped, and then mixed with fat (buffalo fat or mustard oil), spices (including fenugreek seeds, timur (Sichuan pepper), ginger, and garlic), and sometimes blood. The mixture is stuffed back into the intestinal casing and fermented for several days (typically three to five). Gnuchi has a complex, slightly sour, and savory flavor. It is considered a delicacy and is prepared during the Newar festival of Yomari Punhi or for special community feasts. The product is typically sliced and fried before consumption. Outside of the Newar community, gnuchi is not widely consumed in Sikkim.

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Part 5: Starters for Alcoholic Beverages

Sikkim has an exceptionally rich tradition of fermented millet, rice, and other cereal based alcoholic beverages. These are made using dry, cake like starter cultures known by different names across various ethnic groups. These starters are complex consortia of amylolytic molds, fermentative yeasts, and lactic acid bacteria, working in sequence to convert starches into fermentable sugars and then into alcohol. The production of these beverages is particularly significant in the colder, higher altitude regions of Sikkim, where they provide dietary calories and warmth during the harsh winter months.

Marcha (also known as Murcha, Phab)

Marcha is the traditional starter culture used throughout Sikkim to ferment finger millet seeds, rice, or other starchy materials to produce alcoholic beverages. It is known as Marcha among the Nepali communities, Phab among the Lepcha, and also as Murcha in some areas. It appears as a spherical, flattened, or irregularly shaped solid cake, typically white to grey in color, with a rough, matte texture. Marcha is prepared from rice flour (usually a mixture of glutinous and non glutinous varieties) mixed with a variety of wild herbs, roots, barks, and spices, along with an older batch of marcha as an inoculum. The specific plant materials vary by ethnic group and region. Documented ingredients used in Sikkimese marcha include the roots of Plumbago zeylanica (chitu), the barks of Litsea polyantha (kutumer), the leaves of Clerodendrum viscosum (bhamfali), the rhizomes of Curcuma angustifolia (tikhur), and dried chili peppers. The mixture is ground into a paste using a traditional stone grinder, formed into small cakes (typically 3 to 5 cm in diameter), and dried for several days in the sun or near a fireplace. The finished marcha cakes remain viable for several months when stored in a cool, dry place.

The microbial flora of marcha is a complex, stable consortium that has been extensively studied by food microbiologists. It contains lactic acid bacteria, primarily Pediococcus pentosaceus and Lactobacillus plantarum; yeasts belonging to the genera Saccharomycopsis (particularly Saccharomycopsis fibuligera), Pichia, Saccharomyces (including Saccharomyces cerevisiae and Saccharomyces bayanus), and Candida; and the molds Rhizopus (particularly Rhizopus oryzae and Rhizopus chinensis) and Mucor. This combination of amylolytic molds (which secrete alpha amylase and glucoamylase to break down starches into simple sugars) and fermentative yeasts (which convert sugars to alcohol and carbon dioxide) makes marcha a highly effective starter for cereal based fermentations. The molds also contribute to the aroma profile of the final beverage, producing volatile compounds such as ethyl acetate and higher alcohols. The lactic acid bacteria produce organic acids (primarily lactic and acetic acid) that lower the pH, inhibit spoilage organisms, and contribute to the characteristic sour notes of some beverages. The population dynamics shift during the drying and storage of marcha; bacterial populations dominate in fresh cakes, while fungal populations dominate in older, dried cakes. Marcha cakes have a typical population of 10^6 to 10^8 cfu/g of mixed microbes.

Jaanr (also known as Chhyang, Kyapyila among Lepchas)

Jaanr is a mild, sweet sour alcoholic beverage made by fermenting finger millet seeds (kodo, Eleusine coracana), rice (chaamal), or maize (makai) using marcha as the starter. The cereal is cooked (often by steaming until it becomes fluffy and separates easily), spread out on a bamboo mat or banana leaf to cool to room temperature, then mixed thoroughly with crushed marcha powder (approximately 1 to 2% by weight of the cereal). The mixture is packed tightly into an earthen pot (called jaanr ko hando) or bamboo basket, covered with leaves or a cloth, and left to ferment at room temperature for two to five days, depending on ambient temperature. The resulting product is a semi solid fermented mash. This mash is then transferred to a serving vessel, and warm water (not boiling, to preserve the microorganisms) is added. The mixture is stirred and allowed to steep for 10 to 30 minutes. The liquid (jaanr) is then strained through a bamboo sieve (a conical basket called chyangse or dhungro) or cloth and consumed. The remaining solids can be re steeped two or three times until the flavor is exhausted.

Jaanr has a milky, cloudy appearance (due to suspended yeast cells and starch particles), a mildly sweet and sour taste, and an alcohol content ranging from 4 to 8%. It is consumed widely during festivals, social gatherings, and daily meals in many rural Sikkimese communities. Jaanr is offered to guests as a sign of hospitality, particularly among the Lepcha and Bhutia communities, where it is considered a sacred beverage. It is also used in various religious rituals and agricultural ceremonies, such as sowing and harvest festivals (including Losar, the Tibetan New Year, and Sakewa, the Rai community's nature worship festival). Jaanr is a non distilled beverage, meaning it retains live yeasts, molds, and lactic acid bacteria at concentrations of 10^5 to 10^7 cfu/ml. However, the alcohol content limits the quantity one can consume for probiotic benefit. Nevertheless, the beverage contributes to gut health through its live microbial content, its prebiotic soluble fibers, and its content of organic acids that support digestive health. Studies have shown that jaanr has antioxidant properties (with a DPPH radical scavenging activity of 40 to 60%), contains bioactive peptides generated during fermentation, and provides B vitamins, including folate and riboflavin. The beverage is also a source of minerals such as calcium, magnesium, and phosphorus from the millet. In traditional practice, jaanr is believed to help with lactation in nursing mothers and to provide warmth during cold weather.

Tongba (Kodo ko Jaanr)

Tongba is a specific variety of jaanr made exclusively from finger millet (kodo) and is the traditional beverage of the Rai and Limbu (Kiranti) communities, who have a significant presence in West Sikkim (particularly the Soreng and Gyalshing districts). It has a unique serving method that distinguishes it from other jaanr varieties. The fermented finger millet mash is transferred to a special wooden or bamboo vessel, also called a tongba. This vessel is typically cylindrical, approximately 15 to 20 cm tall and 8 to 10 cm in diameter, with a carved or fitted lid. Hot water (not boiling, approximately 70 to 80°C) is poured into the vessel, allowed to steep for 5 to 10 minutes, and the beverage is then sipped through a narrow bamboo straw (pipsing or naluwa). The straw has small holes at the lower end to filter out the millet grains. The same mash can be refilled with hot water three to five times until the flavor is exhausted. Tongba is central to Kiranti cultural identity in Sikkim and is consumed during all major festivals, including Udhauli, Ubhauli, and Chasok Tangnam (the harvest festival). The preparation of tongba is traditionally a male domain, with specific rituals governing its fermentation and serving. The use of finger millet (a high altitude, cold tolerant grain) and the repeated steeping method are adaptations to the cold climate of the Sikkimese hills. The wooden vessels used for tongba are often family heirlooms, passed down through generations, and are believed to enhance the flavor of the beverage due to microbial biofilms that develop on the inner surface over years of use.

Chhaang (also known as Chang)

Chhaang is a Himalayan alcoholic beverage, similar to jaanr, consumed by the Bhutia, Sherpa, Tibetan, and Tamang communities of North Sikkim (Mangan district and the Lachen and Lachung valleys). It is made from barley (particularly the high altitude, naked barley variety known as uwa or nas), rice, or a mixture of grains, using marcha (or the Tibetan equivalent, phab or nyan) as the starter. The preparation method is nearly identical to jaanr. Chhaang is traditionally drunk from a communal wooden or brass bowl through a bamboo straw (called a tchang), with all participants sharing the same vessel as a sign of community and friendship. It is an essential part of Bhutia and Sherpa hospitality and is consumed during all social and religious events, including Losar (Tibetan New Year), Mani Rimdu (a Buddhist festival celebrated at monasteries such as Rumtek and Pemayangtse), and Lhabab Duchen. Chhaang is also credited with providing energy and helping to prevent altitude sickness in the high Himalayas (above 3,000 meters), likely due to its calorie content, hydration properties, and the vasodilatory effects of its low alcohol content (which may improve blood circulation at high altitudes). The barley used in traditional Sikkimese chhaang is typically roasted before fermentation, giving the beverage a distinct nutty, toasty flavor not present in jaanr made from unroasted finger millet.

Raksi

Raksi is the distilled version of jaanr (or chhaang), typically prepared from rice, finger millet, or a mixture of grains. The fermented mash (jaanr) is heated in a traditional copper or aluminum still (locally known as a bhatti). The still consists of a lower pot for the fermented mash, a dome shaped lid that collects the vapors, and a bamboo or metal pipe that passes through a water bath (a smaller pot or trough) to condense the vapors. The condensed liquid (raksi) is collected at the other end. Raksi typically has an alcohol content ranging from 20 to 40%, depending on the number of distillations (single or double distilled). Distillation destroys the live microorganisms, including yeasts, molds, and bacteria, so raksi does not have probiotic properties. Some Sikkimese communities add herbs (such as timur (Sichuan pepper), cardamom, or juniper berries) to the fermented mash or to the final distillate to produce flavored raksi. While raksi is culturally significant in Sikkim and is consumed during ceremonies (particularly in the northern and eastern districts), it does not provide the microbiome supporting qualities that are the cornerstone of fermented health foods. However, the distillation process concentrates certain volatile flavor compounds, making raksi distinct from its source jaanr. Raksi is also used in traditional medicine (both Tibetan and local Sikkimese traditions) as a solvent for herbal preparations (known as ark or asava in Ayurvedic contexts).

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Part 6: Other Fermented Foods

Saelroti (Sel Roti)

Saelroti is a deep fried, ring shaped confectionary bread, produced from fermented rice batter. It is prepared across all communities of Sikkim, particularly during festivals and celebrations. Rice (traditionally a local, aromatic variety) is soaked for several hours (typically 6 to 8 hours), ground into a thick batter (often with added sugar, ground cardamom, cloves, and sometimes ripe mashed banana or coconut milk), and left to ferment naturally overnight or for 8 to 12 hours. The fermentation occurs at room temperature, which in Sikkim's hills ranges from 15 to 25°C. The fermented batter doubles in volume due to carbon dioxide production by naturally occurring yeasts (primarily Saccharomyces cerevisiae and Candida species) and lactic acid bacteria (Leuconostoc and Lactobacillus species). The batter is then poured in a continuous stream into hot oil (ghee or vegetable oil) from a height of about 20 to 30 cm, forming concentric rings that fuse together into a single circular bread. The bread is fried until golden brown and crispy on the outside while remaining soft on the inside. Saelroti is a traditional snack, especially popular during festivals like Dashain, Tihar, and Losar, as well as during weddings and religious ceremonies across all Sikkimese communities. The fermentation process improves the nutritional profile by reducing antinutrients such as phytic acid (by 30 to 50%), increasing the bioavailability of iron and zinc, and adding B vitamins (particularly niacin, riboflavin, and folate) and bioactive peptides. Saelroti is typically consumed on its own or with dahi, vegetables, meat curries, or a cup of sweet milk tea. The bread remains fresh for 3 to 5 days at room temperature and up to two weeks when stored in an airtight container. A sweeter variation, often made with more sugar, coconut, and cardamom, is called fenasi or fenya and is particularly associated with the Newar community of Sikkim.

Kinima

Kinima is a lesser known fermented bamboo shoot product from the Nepali and Lepcha communities of the Terai region of Sikkim (the lowland areas near the border with West Bengal). Unlike the hill bamboo ferments (mesu), which are salt free, kinima is made by fermenting bamboo shoot slices in water with salt (approximately 3 to 5% salt concentration) for two to three weeks. The salt selects for a slightly different microbial community, including more halotolerant Lactobacillus species (such as Lactobacillus hilgardii and Lactobacillus buchneri) and sometimes Pediococcus and Tetragenococcus species. The higher salt concentration also results in a firmer texture and a longer shelf life (up to 6 months when stored in brine). Kinima is consumed as a sour, salty pickle or used as a vegetable in curries. It is particularly popular among the Tharu and other Terai communities but is less common in the higher altitude regions of Sikkim.

Masyaura (Wari)

Masyaura (also known as wari or bari) is a fermented and sun dried product made from black lentil (Vigna mungo) paste mixed with chopped leafy vegetables, particularly taro leaves (Colocasia esculenta, locally known as pindalu) or mustard leaves. The paste is formed into small balls (approximately 2 to 3 cm in diameter, sometimes flattened into discs) and sun dried for several days (typically 3 to 7 days). During the drying process, surface fermentation occurs, primarily from wild yeasts (including Pichia and Candida species) and Bacillus species (including Bacillus subtilis and Bacillus licheniformis). The dried masyaura can be stored for months in an airtight container. It is rehydrated (by soaking in water for 30 minutes) and cooked in curries as a meat substitute, often with potatoes, tomatoes, and spices. Masyaura has a distinctive sour taste contributed by the fermentation. The protein content is approximately 20 to 25% by weight. It is particularly common among the Brahmin and Chhetri communities of Sikkim, who are often vegetarian and use masyaura as a source of protein. While the fermentation is less intense than in products like kinema, it still contributes to digestibility (reducing the flatulence causing oligosaccharides in lentils) and flavor development. In Sikkim, masyaura is often prepared in large quantities during the dry, sunny months of October and November (post monsoon) and stored for the winter and spring seasons when fresh vegetables are less available.

Titauri (also known as Titauri ko Achar)

Titauri is a unique fermented condiment made from the fruit pods of the titauri plant (Bauhinia variegata, also known as the orchid tree or kachnar). The young, tender pods are collected, washed, cut into pieces, and mixed with salt, mustard oil, turmeric, and chili powder. The mixture is packed into an earthen pot and sealed airtight for 10 to 15 days. After fermentation, the sour, slightly astringent pickle is consumed as a side dish. Titauri is particularly associated with the Lepcha community, who traditionally used wild foraged pods. The product is less common today due to declining availability of wild Bauhinia trees and the labor intensive preparation process. The fermentation is driven by lactic acid bacteria, particularly Lactobacillus plantarum and Pediococcus pentosaceus. Titauri is valued for its digestive properties and is believed to help with intestinal parasites in traditional Lepcha medicine. The pickle has a distinct, slightly bitter undertone that sets it apart from other Sikkimese vegetable ferments.

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Scientific Summary: Microbiology of Sikkimese Ferments

Sikkim's fermented foods have been extensively studied by food microbiologists, particularly those at the Defence Food Research Laboratory (DFRL) in Mysore and the Indian Council of Agricultural Research (ICAR) in Sikkim. Key findings include:

The fermented vegetable products (gundruk, sinki, mesu, khalpi) are dominated by lactic acid bacteria, primarily Lactobacillus plantarum, Lactobacillus brevis, Pediococcus pentosaceus, and Leuconostoc fallax. These fermentations are spontaneous and typically complete within 7 to 15 days, resulting in a pH drop from about 6.5 to below 4.0.

The fermented soybean product (kinema) is dominated by Bacillus subtilis, with populations reaching 10^8 to 10^9 cfu/g. The sticky, slimy texture is due to the production of polygamma glutamic acid (PGA), a biopolymer unique to certain Bacillus species.

The fermented dairy products (chhurpi, mohi, dahi) are dominated by Lactobacillus plantarum, Lactococcus lactis, and Leuconostoc mesenteroides. Many of these isolates have demonstrated bile salt hydrolase activity (important for cholesterol metabolism) and antimicrobial activity against pathogens.

The starter cultures (marcha) contain a complex consortium of amylolytic molds (Rhizopus, Mucor), fermentative yeasts (Saccharomycopsis, Saccharomyces, Pichia), and lactic acid bacteria (Pediococcus, Lactobacillus). This combination allows the efficient conversion of starches to sugars and then to alcohol.

Several probiotic strains isolated from Sikkimese fermented foods have been deposited in national and international culture collections, including the National Collection of Industrial Microorganisms (NCIM), Pune, and the Microbial Type Culture Collection (MTCC), Chandigarh. Some of these strains have been patented for potential use in functional foods and nutraceuticals.

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Final Safety and Consumption Note

While traditional fermented foods offer significant probiotic and nutritional benefits, first time consumers should start with small amounts to assess individual tolerance.

For vegetable ferments (gundruk, sinki, mesu, khalpi): Begin with one to two tablespoons of gundruk soup or a small serving (30 to 50 grams) of pickle. The high acidity (pH 3.0 to 4.0) may cause discomfort in individuals with acid reflux, gastritis, or peptic ulcers. These products are generally safe but may cause bloating in individuals unaccustomed to high fiber, fermented foods.

For soybean ferments (kinema): Begin with 10 to 15 grams (approximately one tablespoon) of the product. The strong flavor and ammonia like odor can be surprising to new consumers, and the high protein content (approximately 45%) may cause mild digestive upset in those unaccustomed to it. The product is generally safe for most individuals, and the Bacillus subtilis endospores survive cooking. Individuals with soy allergies should avoid kinema.

For dairy ferments (chhurpi, mohi, dahi): Hard chhurpi should be chewed, not swallowed whole. It poses a choking hazard for young children (under 5 years) and elderly individuals with swallowing difficulties. Soft chhurpi and dahi are generally safe for most consumers, including children, unless they have lactose intolerance. However, the fermentation reduces lactose content by 20 to 40%, making these products better tolerated than unfermented milk. Individuals with severe lactose intolerance should still exercise caution.

For fermented meat and fish (sukuti, sidhra): These products are high in protein and may contain biogenic amines (including histamine and tyramine) if improperly prepared or stored. Individuals on monoamine oxidase inhibitor (MAOI) medications should avoid these products. Pregnant women, immunocompromised individuals, and individuals with gout (high uric acid) should consume these products in moderation due to their high purine content. Sukuti should be thoroughly rehydrated and cooked before consumption.

For alcoholic beverages (jaanr, tongba, chhaang): These contain live microorganisms but also alcohol (4 to 8% ABV). Pregnant women should avoid alcohol entirely. Individuals taking medications that interact with alcohol (including metronidazole, disulfiram, and some antidepressants) should avoid these beverages. Moderate consumption (one to two glasses, approximately 200 to 400 ml) is traditional, but the probiotic benefits do not justify alcohol consumption for individuals who otherwise abstain. The beverage should be made with hot water (not boiling, as boiling kills the microorganisms) for maximum probiotic benefit. For children and adolescents, non alcoholic versions can be made by using the same fermentation process but stopping after 24 hours before significant alcohol production occurs, though this is not traditional.

General precautions: Pregnant women, immunocompromised individuals (including those on chemotherapy, with HIV/AIDS, or post organ transplant), and infants under one year should consult a physician before adding any new fermented foods to their diet. Individuals on monoamine oxidase inhibitor (MAOI) medications should avoid high amine ferments such as long stored gundruk (older than 6 months), sukuti, and hard aged chhurpi due to potential histamine and tyramine interactions, which can trigger hypertensive crises.

Note on Distilled Liquors: Distilled liquors such as raksi are not recommended as probiotic sources. The distillation process destroys all live microorganisms. The prebiotics, probiotics, and most bioactive compounds that are the cornerstone of health foods are removed during distillation. Only non distilled, live fermented beverages like jaanr, tongba, and chhaang retain their microbial content. However, as noted above, the alcohol content of even these non distilled beverages limits their use as probiotic vehicles.

Storage advice for maximum probiotic benefit: Most Sikkimese fermented foods retain their live microbial populations for 3 to 6 months when properly dried (for gundruk, sinki, kinema) or stored in a cool, dry place. Refrigeration extends the viability of probiotics in soft products (soft chhurpi, fresh khalpi, dahi, mohi) to 2 to 4 weeks. Hard chhurpi retains viable microbes for up to 12 months at room temperature due to its low moisture content. For maximum probiotic benefit, consume these foods within 2 months of production for dried products and within 2 weeks for fresh, high moisture products. Heat kills most vegetative bacterial cells, though Bacillus endospores in kinema survive boiling. Therefore, adding fermented products to hot soups or curries just before serving (rather than boiling them for extended periods) preserves more live probiotics.

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