Is Fitness Vitality DNA useful for Fruchtbarkeit?

The question of whether 'Fitness Vitality DNA' is useful for fertility cannot be answered positively based on the provided context. The context describes Anti-Müllerian hormone (AMH) as a biomarker for ovarian reserve, not fertility itself. AMH can moderately predict time to menopause (AUC 0.83 at age 35–39; PMID:27179263) and helps guide IVF dosing, but it does not predict natural conception. The DNA-related contexts (FADS1, APOA2, PPARA, GC) show small effect sizes and marketing claims. In particular, the claim that 4000 IU vitamin D is needed based on a GC variant is rated as 'marketing/unclear'. There is no evidence that a DNA test like 'Fitness Vitality DNA' improves fertility. The evidence is weak and based on associations, not clinical validation. Consumers should not rely on such tests and should seek medical advice.