Fermented Indian foods
Reviewed by Dr. Nikita Dinger, Founder & CEO, BioMeBar. Last reviewed 7 October 2026.
Click to WhatsAppTake the Gut Quiz
India has one of the richest fermented food traditions in the world, from dahi and chaas to idli, dosa, dhokla, kanji and kimchi-like pickles in the north-east. These foods can contain live microbes and are part of many people’s regular diets. They are enjoyable and often nourishing, but a fermented food is not the same thing as a defined probiotic, and not every one still has live bacteria by the time you eat it.
What fermentation does
Fermentation is the process in which microbes such as lactic acid bacteria and yeasts change the sugars and starches in a food. The results include sourness, new flavours, a longer shelf life and, in some cases, higher availability of certain nutrients. The 2021 ISAPP consensus defines fermented foods as foods made through desired microbial growth and conversion of food components by enzymes. That definition does not require live microbes in the final product, which is a key point.
Some familiar examples
| Food | What happens | Live microbes at serving? |
|---|---|---|
| Dahi, chaas, lassi | Milk fermented by lactic acid bacteria | Usually yes, if not heated afterwards |
| Idli and dosa batter | Rice and urad dal fermented by wild microbes | No after steaming or cooking, though the fermentation changes the food |
| Dhokla, handvo | Batter fermented, then steamed | No after steaming |
| Kanji (carrot or beet) | Vegetables fermented in salted water | Often yes, if homemade and uncooked |
| Pickles (achaar) | Depends: oil-and-spice pickles are often not fermented in the same way | Varies widely |
| Fermented bamboo shoot, gundruk, axone and similar foods from the Himalayan and north-east regions | Traditional lactic fermentations | Often yes, if eaten uncooked |
Cooking, frying and steaming usually kill the microbes. That does not make idli or dosa less valuable as food, but it does mean they should not be counted as a probiotic source.
What research shows and does not show
Large observational studies have linked regular intake of fermented dairy such as yoghurt with better health outcomes in some groups. These studies cannot prove cause, since people who eat dahi regularly may also differ in other ways. Small trials suggest some fermented foods can increase microbial diversity or change inflammation markers, but results vary and the studies are short.
What we do not know well: which microbes in home-made foods survive to the colon, how much they differ between households and seasons, and whether they offer the same effects as strains tested in trials. Traditional foods are not standardised, so each batch differs.
Food safety
- Use clean utensils and containers, and fresh ingredients.
- Throw away anything with unusual mould, a slimy or foul smell, or an off colour.
- Pregnant people, small children, older adults and anyone immunosuppressed should be cautious with unpasteurised or home-fermented products and may wish to ask a doctor.
- High salt in pickles and some fermented foods matters if you manage blood pressure.
Click to WhatsAppTake the Gut Quiz
Practical takeaways
- Include a serving of plain dahi or chaas in meals if you tolerate dairy. Add cucumber, roasted jeera or mint for taste.
- Choose regional ferments that are part of your family’s tradition. They are culturally rooted and often affordable.
- Do not expect a fermented food to act like a specific probiotic strain. If you want a defined strain at a defined dose, that is a supplement conversation.
- Introduce new fermented foods slowly if you get bloated, and check with a clinician if you have known histamine sensitivity, since some ferments are higher in histamine.
Common questions
Is shop-bought dahi as good as homemade?
Both can contain live cultures. Labels vary, and a plain, unflavoured product with a short ingredient list is usually the simplest choice.
Can fermented foods replace a probiotic?
They are different things. Fermented foods are foods, with variable microbes. Probiotics are defined strains with a documented health effect at a studied dose.
Are fermented foods good for lactose intolerance?
Some people with lactose intolerance tolerate dahi better than milk, since fermentation lowers lactose. Tolerance varies.
Making the most of what you already eat
Many people think they need imported foods to look after their gut, when often the best choices are already in the kitchen. A bowl of dahi with lunch, chaas in summer, a fermented rice dish such as pazhaya sadam in parts of the south, or a small portion of homemade kanji in winter all fit into a normal week. Keep portions modest at first, notice how your gut responds, and keep what works for you.
Does the temperature matter?
Yes. Adding live dahi to a very hot dish will reduce the number of live microbes. If your goal is to eat live cultures, add dahi to food that has cooled to a comfortable temperature.
Related reading
- Probiotics vs prebiotics vs synbiotics
- Prebiotic foods in India
- Histamine intolerance explained
- South Indian gut-friendly diet
Sources
- Marco ML, et al. 2021. The International Scientific Association for Probiotics and Prebiotics consensus statement on fermented foods. Nature Reviews Gastroenterology & Hepatology.
- Tamang JP, Watanabe K, Holzapfel WH. 2016. Review: Diversity of microorganisms in global fermented foods and beverages. Frontiers in Microbiology.
- Hill C, et al. 2014. The International Scientific Association for Probiotics and Prebiotics consensus statement on the scope and appropriate use of the term probiotic. Nature Reviews Gastroenterology & Hepatology.
Talk to us
If you would like to know whether BioMeBar can support you, message us on WhatsApp. Tell us your symptoms and your pincode and we will take it from there. Not sure where to start? Take the free gut assessment, which takes about three minutes.
Click to WhatsAppTake the Gut Quiz
BioMeBar provides nutrition and gut health guidance and does not replace medical care. See a doctor for severe, persistent or worrying symptoms.