wann sollte man am besten kefir trinken — when to see a doctor?

The optimal timing for drinking kefir lacks strong clinical evidence. General advice suggests consuming kefir with meals or before bedtime due to its probiotic content, which may support gut health. Some individuals tolerate kefir better on an empty stomach, while others experience bloating – personal experimentation is key. You should see a doctor if you experience persistent abdominal pain, diarrhea, nausea, or allergic reactions (rash, itching) after kefir. Also, if you are immunocompromised (e.g., chemotherapy, HIV, organ transplant), consult a physician before regular consumption, as rare infections from kefir bacteria have been reported. Kefir is not recommended for infants under 12 months. The evidence base is weak to moderate; most recommendations stem from tradition and observational data rather than robust clinical trials. No genetic test for kefir tolerance exists and would not be clinically useful.