What to watch with BDNF and Müdigkeit?

BDNF (brain-derived neurotrophic factor) plays a key role in neuronal health and energy metabolism. Variants like rs6265 (Val66Met) are associated with reduced activity-dependent BDNF secretion and have been linked to fatigue, especially under stress or after exercise. However, the evidence is moderate: effect sizes are small, and fatigue is multifactorial (sleep, nutrition, stress, medical conditions). Direct-to-consumer DNA tests often oversimplify this link. If you experience persistent fatigue, a clinical workup (iron, thyroid, sleep disorders) is more important than a single gene result. Lifestyle factors such as aerobic exercise, adequate sleep, and omega-3 intake can support BDNF levels. Do not rely solely on genetic testing for fatigue management.