Is Magnesium useful for sleep?

The question of whether magnesium is useful for sleep is common, but the scientific evidence is moderate and context-dependent. Magnesium is an essential mineral involved in regulating the nervous system and muscle relaxation. Some randomized controlled trials show that magnesium supplements can reduce sleep onset latency and improve sleep quality, particularly in individuals with magnesium deficiency or in older adults with insomnia. However, the effects are generally modest and not universal. Importantly, most people in Western countries do not have a clinical magnesium deficiency. High doses can cause diarrhea and gastrointestinal discomfort. The provided context contains no direct studies on magnesium and sleep, so this answer is based on general scientific literature. For personalized advice, consult a healthcare professional. In summary, magnesium may be useful for certain individuals but is not a guaranteed sleep aid.