Mikrobiom Test: which blood markers matter?

The question about which blood markers matter for a microbiome test is relevant, but the provided knowledge context does not contain specific information on this. Generally, microbiome analyses use stool samples, not blood. However, certain blood markers can indirectly reflect gut health: inflammatory markers like hs-CRP, calprotectin (also in stool), ferritin, vitamin B12, vitamin D, zinc, and possibly liver enzymes (ALT, AST) and lipids. However, the direct causal link between blood markers and the microbiome is often weak and not standardized. Based on the available context, MyBody-X does not appear to offer a specific microbiome blood test; the existing tests cover nutrient deficiencies and hormones. Therefore, the evidence for using blood markers to assess the microbiome is rated as 'unclear' or 'practice'. Clinical interpretation by a physician is always necessary.