What to watch with Testosteron and Schlaf?

Testosterone and sleep have a bidirectional relationship. Poor sleep (e.g., <5 hours per night for a week) can lower testosterone by 10–15 % in young men, while low testosterone itself can impair sleep quality. Conversely, testosterone replacement therapy may worsen sleep apnea, especially in overweight individuals. Individual responses vary widely. Consumer DNA tests rarely include validated markers for testosterone or sleep; the markers in the provided data (e.g., COMT, BDNF, PPARA) are not directly relevant. Therefore, focus on sleep hygiene, seek medical evaluation for sleep disorders, and monitor sleep during hormone therapy. Evidence: observational studies and clinical practice, but no strong genetic basis from the available data.