Evidence check: BDNF in the context of Schlaf

BDNF (Brain-Derived Neurotrophic Factor) is a key protein for neuronal plasticity and plays a role in sleep regulation, particularly in memory consolidation during deep sleep. Studies show that the BDNF Val66Met polymorphism (rs6265) affects protein secretion and is associated with altered sleep architecture – e.g., less slow-wave sleep or increased insomnia susceptibility. The evidence comes mainly from observational studies and GWAS; effect sizes are small and modifiable by lifestyle factors (stress, exercise, diet). A direct causal effect of single BDNF variants on sleep quality is not well established. MyBody-X tests may analyze rs6265, but clinical relevance for individuals is limited. Interpreting genetics alone without considering sleep hygiene, chronotype, and environmental factors is not advisable. Safety note: Do not change sleep medication or therapy based solely on a genetic test. Evidence grade: human-moderate.