Evidence check: BDNF in the context of Müdigkeit

BDNF (Brain-Derived Neurotrophic Factor) is frequently discussed in relation to neuronal plasticity, mood regulation, and cognitive function. Some observational studies suggest that lower BDNF levels may be associated with fatigue, especially in conditions like chronic fatigue syndrome (ME/CFS) or depression. However, the evidence linking common BDNF gene variants (e.g., Val66Met) directly to general fatigue in healthy individuals is limited and inconsistent. Effect sizes are small, and many confounding factors (sleep, stress, nutrition, physical activity) play a more dominant role. Consumer DNA tests for BDNF are not clinically validated for diagnosing or predicting fatigue. Therefore, while BDNF is a plausible biological marker, its utility as a standalone predictor of fatigue is not supported by strong evidence. MyBody-X tests are for informational purposes only and do not constitute medical advice. Persistent fatigue should be evaluated by a healthcare professional.