What do studies say about Kefir Ernährung?

Kefir is widely marketed as a probiotic food with benefits for gut health. Human studies suggest moderate effects on lactose digestion, immune modulation, and lipid profiles, but results are heterogeneous and often limited by small sample sizes or short durations. Mechanistic evidence points to anti-inflammatory and antimicrobial properties of kefir cultures. Evidence for specific clinical outcomes (e.g., weight loss, blood sugar control) is mixed and often derived from animal or in vitro models. A single consumer DNA or microbiome test cannot predict individual responses to kefir. Caution is advised for individuals with lactose intolerance or compromised immunity. Overall, kefir is a nutrient-dense food, but health claims frequently outpace the scientific evidence.