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0.5–2% alcohol which isn’t significant unless you were to drink it by the gallon. that is similar to Kombuchas.

0,002–0,005% for mass produced Kefir in Germany as per Wikipedia.

Mass produced is probably not what you want because it's usually pasteurized.

I still kind of like texture and how it keeps cold so when I drink it in the morning it is refreshing.

Mostly use it to have it as something before I drink coffee not to have one on empty stomach.