They are all fermented milk foods, but they are made differently and they are not the same. Kefir is a thin, tangy, lightly fizzy drink made with kefir grains. Dahi is the South Asian name for yogurt that sets in a bowl. Lassi is not a separate ferment: it is a drink made by blending dahi with water or milk.
| Kefir | Yogurt and dahi | Lassi | |
|---|---|---|---|
| What it is | Milk fermented by kefir grains | Milk fermented by a yogurt starter and set | A drink made from dahi |
| Texture | Thin and drinkable | Thick and spoonable | Thin and smooth |
| Taste | Tangy, a little sour, slightly fizzy | Mild to tangy | Sweet or salty, depending on the recipe |
| Made at | Room temperature, about 12 to 24 hours | Kept warm for several hours until it sets | Blended in minutes from dahi |
| Microbes | A wide mix of bacteria and yeasts | A smaller, specific mix of bacteria | Whatever the dahi contains |
| Reusable culture | The grains, indefinitely | A spoon of the last batch | The dahi you start from |
Are kefir and lassi the same?
No. You can drink both from a glass, which is why people ask. Lassi starts from dahi and is blended with water, sugar or salt. Kefir is fermented from milk by its own grains and has a sharper, tangier taste.
Is kefir yogurt a real thing?
Yes. Kefir yogurt is yogurt cultured with kefir. It is thicker than kefir and thinner than set yogurt. See Kefir Yogurt and Greek Yogurt in Peshawar.
Which should I choose?
There is no single winner. Kefir is the best choice if you like a tangy drink and want to brew your own. Dahi is the everyday kitchen staple. Use kefir where you would use thin buttermilk or lassi, for example in smoothies and dressings.
Sources: Cultures for Health, Introduction to milk kefir, opened 9 October 2026. Written by KefirBuy.