What to watch with Zink and Schlaf?

Zinc is involved in sleep regulation through its role in GABA signaling and melatonin synthesis. Observational studies suggest low zinc levels correlate with poor sleep quality, especially in older adults. However, the evidence is moderate: most findings come from cross-sectional or small intervention studies, not large RCTs. Zinc supplements are not a proven sleep aid. Doses above 25 mg/day of elemental zinc may cause nausea or copper deficiency. MyBody-X tests can measure serum zinc, but a single blood level does not reliably reflect tissue status or predict sleep benefits. For sleep issues, prioritize sleep hygiene, stress management, and other nutrients like magnesium. Zinc testing may be useful if deficiency is suspected (e.g., vegan diet, chronic inflammation), but not as a standalone sleep diagnostic.