was ist kefir — what symptoms are typical?

Kefir is a fermented milk drink rich in probiotics and yeasts. Typical symptoms after consumption can be both positive and negative. Positive: improved digestion, reduced bloating, and enhanced gut flora. Negative: in sensitive individuals or with excessive intake, symptoms like bloating, diarrhea, or stomach cramps may occur, especially in lactose intolerance. The evidence for health benefits is mostly mechanistic and observational; large randomized controlled trials are often lacking. Kefir is a food, not a medicine. Individual tolerance varies greatly. For persistent symptoms, consult a doctor. Home microbiome tests have limited predictive value and are not equivalent to clinical diagnostics.