What to watch with Selen and Schlaf?

The combination of selenium and sleep is nutritionally plausible but evidence is limited. Selenium is an essential trace mineral that supports antioxidant enzymes (selenoproteins) and thyroid hormone metabolism. Adequate selenium status may indirectly benefit sleep by reducing oxidative stress and optimizing thyroid function, which influences sleep architecture. However, no high-quality clinical trials directly demonstrate that selenium supplementation improves sleep in healthy individuals. Excessive intake (>200 µg/day from supplements) can cause selenosis, potentially worsening sleep. Dietary sources like Brazil nuts, fish, and eggs usually suffice. DNA tests for selenium-related genes (e.g., SELENOP, GPX1) have weak predictive value for sleep outcomes. Practical advice: focus on a balanced diet meeting the RDA (55 µg/day for adults). For sleep issues, prioritize sleep hygiene, light management, and stress reduction before considering selenium. Evidence is moderate at best; do not rely on consumer genetic tests for this combination.