What do studies say about Kefir Basis?

The provided context does not include any specific studies on kefir. Generally, kefir is a fermented dairy product containing probiotic bacteria and yeasts. Studies suggest potential benefits for gut health, immune modulation, and possibly metabolic parameters, but the evidence is heterogeneous and often limited to small studies or animal models. Without direct context data, no robust conclusion about kefir as a 'basis' can be drawn. Evidence is rated as 'unclear'. Consumers should critically evaluate marketing claims and rely on established dietary guidelines.