Glossary

What are probiotics?

Probiotics are live microorganisms, mostly friendly bacteria and some yeasts, that are meant to benefit your health when you eat them. They're found in dahi, other fermented foods and in supplements.

Written by Poshan Labs. Sources are named on the page. Last updated 26 October 2026.

Probiotics: live microorganisms, mostly friendly bacteria and some yeasts, that are meant to benefit your health when you eat them.

Why probiotics matter

Your gut is home to trillions of bacteria that help with digestion and immunity.

What the evidence says:

  • Probiotics look promising for a few specific uses, such as preventing diarrhoea that comes with antibiotics.
  • For many other conditions the evidence is still mixed, and it isn't clear which strains help whom.
  • Probiotics from food have a long record of safe use in healthy people.
  • People who are seriously ill or have weak immunity face more risk from probiotic supplements.

Probiotics in Indian food

The simplest way to get probiotics is through traditional foods:

  • a katori of homemade dahi
  • a glass of chaas
  • fermented foods like idli, dosa and kanji

Feed your gut bacteria too, with fibre from vegetables, fruit, whole grains and pulses.

If you're thinking about a probiotic supplement, especially if you have a health condition, a weak immune system or are on treatment, check with your doctor first rather than picking one off the shelf.

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