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What is the history and cultural significance of airag?

Quick answer

Airag is a lightly alcoholic, sour drink made by fermenting fresh mare's milk, and it is the best-known traditional drink of Mongolia, especially in summer. Herding families make it, and travel and cultural sources describe it being offered to guests and served at gatherings. A peer-reviewed study measured about 1.4 to 2.3 percent alcohol in samples, so it is much weaker than beer-strength drinks.

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In this article
  1. What is airag?
  2. How is airag made?
  3. How strong is airag?
  4. What does airag taste like?
  5. Why is airag important in Mongolian culture?
  6. Where can you try airag?

What is airag?

Airag is fermented mare’s milk, a staple summer drink among Mongolian herders. It is slightly fizzy, sour and thin, closer to a tangy kefir than to wine.

How is airag made?

Fresh mare’s milk is strained and left to ferment with a starter of lactic acid bacteria and yeasts, often some earlier airag. Traditionally it is stirred or churned by hand in a leather sack, according to travel sources. The microbes turn milk sugar (lactose) into lactic acid, a little alcohol and carbon dioxide, which is why it is sour and gently bubbly. Travel sources say the stirring and fermenting take about a day or two.

How strong is airag?

Strength varies from batch to batch and between sources. One peer-reviewed study measured about 1.4 to 2.3 percent alcohol by volume in airag samples; other, less rigorous sources give roughly 0.5 to 3 percent. Treat it as a mild fermented drink, but it is still alcohol, so the usual cautions apply for driving, pregnancy and anyone who avoids alcohol. It is not a distilled spirit.

What does airag taste like?

  • Sour and tangy, like thin yogurt drink.
  • Lightly fizzy, with a faint yeasty or alcoholic edge.
  • Varies by maker: fresher airag is milder, older airag sourer.

Why is airag important in Mongolian culture?

Airag is a summer drink tied to herding life. It is commonly offered to guests and is part of family gatherings and festivals, according to travel and cultural sources.

Where can you try airag?

Mostly in Mongolia, where it is made seasonally. It is rarely sold elsewhere because fresh fermented milk does not travel well. Because traditional airag is made from raw milk, travelers with weakened immunity or pregnancy should ask a doctor first.

People also ask

Is airag alcoholic?

Yes, mildly. A peer-reviewed study measured about 1.4 to 2.3 percent alcohol by volume, and other, less rigorous sources give roughly 0.5 to 3 percent, depending on the batch.

What is airag made from?

Fresh mare's milk, fermented with lactic acid bacteria and yeasts, traditionally stirred by hand in a leather sack, according to travel sources.

What does airag taste like?

Sour, thin and slightly fizzy, like a tangy kefir with a faint alcoholic edge. Fresh batches are milder than older ones.

General information only, not medical advice. If you have a health condition or are pregnant, ask your doctor before changing what you drink.

Sources

  1. Journal of Animal Science and Technology (2016): study of airag composition, Ulaanbaatar samples, read 5 Nov 2026
Written by Drinks Type Editorial Team · Published Feb 28, 2026 · Updated Nov 5, 2026
About · How we verify this · Editorial policy · Corrections

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