What do studies say about Kefir Check?

The provided context does not contain specific studies or product details for a 'Kefir Check'. The term might refer to a test for kefir tolerance or microbiome response after kefir consumption. Generally, kefir is a probiotic food with some evidence for gut health benefits, but evidence for a dedicated 'Kefir Check' is lacking. MyBody-X offers microbiome and genetic tests (e.g., FUT2) that could indirectly relate to kefir metabolism, but no direct test is described. Evidence is therefore 'unclear' or 'marketing'. Consumers should not rely on single gene tests or product claims and should consult a healthcare professional.