wann trinkt man am besten kefir — which blood markers matter?

The question about the best time to drink kefir and which blood markers matter cannot be answered from the provided context. The context includes information on genetic variants (e.g., VKORC1, TNF, NRF2) and product descriptions from MyBody-X, but nothing about kefir or specific blood markers. Generally, kefir is often consumed in the morning on an empty stomach to maximize probiotic benefits, but evidence is weak. Potential blood markers that could be affected by kefir include inflammatory markers like CRP and TNF-alpha, as well as gut health markers like zonulin or calprotectin. However, robust clinical studies confirming an optimal timing or specific markers are lacking. The evidence level is 'mixed' or 'unclear'. Without direct context data, no evidence-based recommendation can be made.