Health topic
Sleep & Recovery
What the clinical evidence actually says about supplements for sleep quality, circadian rhythm and overnight recovery — with the caveats spelled out rather than glossed over.
Better rest is rarely one supplement away
Sleep is one of the most powerful levers for health, so it's no surprise that a whole category of supplements promises deeper, faster, more restorative rest. A few — magnesium, melatonin, glycine, L-theanine — have plausible mechanisms and some supportive trials behind them.
But the evidence is usually modest and short-term, and most studies measure how people feel they slept rather than hard physiological outcomes. Supplements tend to help most in specific situations — a genuine deficiency, jet lag, mild trouble settling — rather than as a cure for chronic insomnia.
Each review here explains the mechanism, weighs the human data honestly, notes realistic doses and safety limits, and is clear about when sleep hygiene or a clinician's input matters more than any capsule.
Browse the sleep & recovery library
Every review is evidence-graded. Refine by supplement type, goal, evidence strength and common concerns.
Sleep & recovery articles
Reviews and guides on supplements for sleep and overnight recovery.
Alcohol & Recovery
What the research shows about alcohol
Magnesium for Sleep: What the Evidence Really Says About Better Rest
This article reviews whether magnesium can improve sleep, summarizing the clinical evidence, common supplement forms, dosage context, and key safety considerations.
Evidence reviews are on the way
We're building this section carefully — each guide goes through the same evidence-grading and safety review as the rest of Supplete. New articles will appear here as they're published.
Explore Supplement Facts →