What should I know about Kefir Ernährung?

Kefir is a fermented milk product rich in probiotic bacteria and yeasts. A kefir-based diet is often promoted for improved gut health, digestion, and immune support. Some studies suggest benefits for cholesterol levels and lactose tolerance, but many claims rely on small or mechanistic studies rather than large human trials. The microbial composition of kefir varies widely, limiting reproducibility. For healthy individuals, moderate consumption is safe, but those with lactose intolerance or histamine sensitivity may experience adverse effects. Overall, the evidence for specific health outcomes is moderate to mixed; marketing often overstates the scientific support.