What role does Selen play in Schlaf?

The direct role of selenium in sleep is not well established by scientific evidence. Selenium is an essential trace mineral that functions primarily through selenoproteins (e.g., glutathione peroxidases) as an antioxidant and supports thyroid hormone metabolism. Inadequate selenium intake can impair thyroid function, which may indirectly affect sleep–wake regulation – for example, through fatigue or altered body temperature. However, no robust human studies demonstrate a direct causal link between selenium status and sleep quality, latency, or duration. Existing data are limited to observational studies or animal models. Supplementing selenium beyond the recommended dietary allowance is not advised, as high doses are toxic (selenosis). For sleep issues, focus on proven factors: stress, light exposure, caffeine, and sleep hygiene. Genetic testing for selenium-related variants (e.g., in SELENOP or GPX1) currently offers no clinical value for sleep optimization. Evidence: unclear/mechanistic.