wie viel protein pro tag muskelaufbau — can a DNA test help?

Can a DNA test tell you exactly how much protein you need for muscle building? Currently, the evidence is weak. While some genetic variants (e.g., ACTN3, MSTN) are associated with muscle fiber composition or growth potential, they do not provide a precise protein requirement. General guidelines for muscle gain recommend 1.6–2.2 g protein per kg body weight per day, based on robust sports nutrition research, not genetics. DNA tests marketed for nutrition often include irrelevant markers (e.g., lactose intolerance, caffeine metabolism) and lack validated algorithms for protein dosing. The effect sizes of relevant SNPs are small, and lifestyle factors (training intensity, total calorie intake, sleep) dominate. A DNA test may offer curiosity-driven insights but cannot replace evidence-based dietary planning. For personalized advice, consult a registered dietitian or sports medicine professional. Evidence: marketing/unclear.