Alcohol Content of Kefir and Kumiss

Alcohol content of Kefir & Kumiss are respectively:

Correct Answer: 1% (Kefir) & 2.5% (Kumiss)

Kefir contains 1% alcohol and 1% lactic acid. Kumiss contains 2.5% alcohol. Kumiss has approximately 2.5 times more alcohol than Kefir because mare's milk is richer in lactose (~6.2%) which provides more substrate for yeast fermentation.

Why Kumiss Has More Alcohol Than Kefir

• Mare's milk has higher lactose content (~6.2%) compared to cow milk (~4.9%).
• More lactose → more substrate for yeast → more ethanol produced.
• Fermentation conditions and culture used (L. acidophilus + yeast) also favor higher alcohol production in Kumiss.

Fermented Dairy Products — Key Numerical Data

• Kefir: 1% lactic acid + 1% alcohol
• Kumiss: ~0.7–1% lactic acid + 2.5% alcohol
• Dahi: 0.5–1% starter, fermented at room temperature
• Srikhand: Minimum 8.5% fat, max 72.5% sugar (on dry basis)