wie viel gene hat der mensch — can a microbiome test help?

This question merges two distinct topics: the number of human genes and the utility of a microbiome test. Humans have roughly 20,000–25,000 protein-coding genes, a well-established fact from the Human Genome Project. A microbiome test does not measure or alter these genes. Claims that such tests can provide personalized dietary advice are not supported by robust evidence. The PRECODE trial is a rigorous design but has not yet published results; current evidence is mostly mechanistic or marketing. No validated algorithms exist for translating microbiome data into individual food recommendations. A microbiome test may offer a rough snapshot of bacterial diversity, but it cannot diagnose or guide therapy. For general health, a high-fiber, diverse plant-based diet is more evidence-based. Caveat: these tests are lifestyle tools, not medical diagnostics. Consult a doctor for specific health concerns.