What do studies say about Haarausfall Männer?

The provided context does not contain any studies specifically addressing hair loss in men. The entries cover DNA variants (MTHFR, ACE, LEPR) and microbiome topics, but not androgenetic alopecia or other hair loss conditions. Generally, male pattern baldness is strongly genetic (AR gene, chromosome 20) and influenced by dihydrotestosterone (DHT). However, evidence for direct-to-consumer DNA tests predicting or guiding treatment for hair loss is weak; single SNP effects are small and often overstated. Without relevant studies in the given context, no evidence-based conclusion can be drawn. For reliable information, consult clinical guidelines on treatments like minoxidil or finasteride, which have stronger evidence.