Raw kefir is fermented raw milk made by adding heirloom kefir grains (a symbiotic culture of yeasts and lactic-acid bacteria) to raw milk and letting it ferment for 24 to 36 hours. It is tart, fizzy, lightly carbonated, and dense in live probiotic cultures.

Is raw kefir lactose-free?

Not entirely, but most of the lactose is consumed by the kefir grains during fermentation. Raw kefir is significantly more digestible than raw milk for lactose-sensitive drinkers; many people who cannot drink milk drink raw kefir daily without issue.

How is raw kefir different from supermarket kefir?

Most supermarket kefir is pasteurized after fermentation, which kills the live cultures. Raw kefir is never pasteurized; the cultures are alive and provide actual probiotic activity. Raw kefir also typically uses heirloom grains (30+ species) versus commercial kefir cultures (2 to 5 species).

How long does raw kefir last in the fridge?

Two to three weeks. It continues to ferment slowly in the fridge and gets progressively tarter and more carbonated. Many people prefer it after 4 to 7 days when the flavor has rounded out.

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What raw kefir is

Kefir is fermented dairy. Heirloom kefir grains (a symbiotic culture of yeasts and lactic-acid bacteria) are dropped into raw milk and left to ferment for 24 to 36 hours at room temperature. The grains consume most of the lactose and produce a tart, fizzy, lightly carbonated drink with billions of probiotic organisms per glass.

"Raw" kefir means the milk was not pasteurized before fermentation, and the kefir is not pasteurized after. Most grocery-store kefir is pasteurized after fermentation, which kills the live cultures and turns kefir into a yogurt-style drink with no probiotic activity.

Raw kefir, Saturday in Manhattan

$13 a quart. $7 flat delivery. Order by Thursday 8pm.

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What it tastes like

Tart. Fizzy. Slightly effervescent at the bottom of the glass. Thicker than milk, thinner than yogurt. The grass-fed cream gives it body. The taste is closer to plain Greek yogurt than to anything labeled "kefir" at a supermarket. Most people drink it cold, straight, or stirred with a spoonful of honey or a half-banana for breakfast.

Why raw matters for kefir

Live cultures. Pasteurization-after-fermentation kills the probiotics. Raw kefir delivers them alive.
Microbial diversity. Heirloom grains carry 30+ species of yeast and bacteria. Commercial yogurt cultures use 2 to 5.
Lactose-friendly. The fermentation consumes most of the lactose. Raw kefir is even more digestible than raw milk for most lactose-sensitive drinkers.
Native nutrients. Vitamin K2, B vitamins, fat-soluble vitamins, native enzymes, and the full grass-fed dairy fat profile.

How to use raw kefir

Drink it cold, straight from the glass.
Stir into a smoothie with frozen berries.
Pour over granola in place of milk.
Use as a buttermilk substitute in pancakes, biscuits, dressings, marinades.
Keep cold; it slowly continues to ferment in the fridge and gets sharper over a week.

Where can you buy raw kefir in NYC?

Raw kefir is not sold at Whole Foods, Trader Joe's, or any major NYC grocery. Some specialty health food stores stock pasteurized kefir from raw-fed herds (a few brands), but the cultures are dormant. Live raw kefir is delivered farm-direct from licensed New York dairies. farm-to-door runs the Saturday Manhattan route.

Raw kefir delivery in NYC.