How are Zink and Schlaf related?

Zinc is an essential trace element involved in many metabolic processes, including sleep regulation. It supports the synthesis of neurotransmitters such as GABA and serotonin, which promote relaxation and sleep initiation. Zinc also plays a role in the conversion of tryptophan to melatonin, the key sleep hormone. Consequently, zinc deficiency has been linked to poor sleep quality and insomnia. However, the evidence is moderate: some randomized controlled trials show modest improvements in sleep parameters with zinc supplementation, but results are inconsistent and often depend on baseline zinc status. Most data come from observational studies or small trials. Consumer DNA tests cannot reliably assess zinc status because blood levels are influenced by diet, absorption, and medications. For sleep issues, optimizing diet and sleep hygiene should come first. Zinc supplementation should not exceed 25–40 mg/day to avoid side effects like nausea and copper deficiency. Evidence: human-moderate.