Supplement Support
Supplements for Insomnia
Evidence-based supplements for sleep — timing vs quality, acute vs chronic, and when melatonin actually helps.
Insomnia breaks into two loosely-overlapping problems: difficulty falling asleep (sleep-onset insomnia) and difficulty staying asleep or poor sleep quality (maintenance insomnia). Supplement picks depend on which you have. Sleep hygiene, exercise timing, light exposure, and caffeine curfews affect sleep more than any supplement does — start there. If sleep hygiene is solid and the problem persists, the supplements below have RCT-level evidence.
Evidence-rated supplements
Improves subjective and objective sleep quality in insomnia RCTs. Particularly useful when anxious thoughts or muscle tension disrupt sleep.
Dose: 300–400 mg elemental, 30–60 minutes before bed
Full Magnesium Glycinate profile →Strongest for circadian-timing issues (jet lag, shift work, delayed sleep phase). Modest effect in ordinary insomnia but reliable when timing is the issue.
Dose: 0.3–1 mg, 30–60 minutes before bed. Higher doses paradoxically disrupt sleep architecture.
Full Melatonin profile →Human RCTs show improved subjective sleep quality and reduced next-day fatigue. Effects are subtle but consistent.
Dose: 3 g powder in water, 60 minutes before bed
Full Glycine profile →Not a sleep initiator per se — reduces pre-sleep mental arousal. Best paired with magnesium for anxious-mind insomnia.
Dose: 200 mg, 30 minutes before bed
Full L-Theanine profile →GABAergic action with modest RCT support. Stronger effect on subjective than objective sleep measures. Unpleasant smell limits compliance.
Dose: 400–900 mg root extract, 30–60 minutes before bed
Full Valerian profile →Lifestyle context
Consistent wake time (more important than bedtime), morning bright light exposure, caffeine cutoff by 12pm, screen cutoff 1–2 hours before bed, and bedroom at 65–68°F are the highest-impact non-pharmacological interventions. CBT-Insomnia (CBT-I) has better long-term evidence than any sleep medication or supplement.
When to see a clinician
Insomnia lasting more than 3 months, waking gasping for air (possible sleep apnea), severe daytime sleepiness, or sleep problems tied to emerging depression warrant a sleep study or clinician evaluation. CBT-I is first-line for chronic insomnia and outperforms medication long-term.
Related stack
Ready-to-take protocol
Sleep Stack
Four evidence-backed supplements that improve sleep quality without sedating you the next morning.
Related reading
Next steps
Educational only. This page is not medical advice. Discuss any supplement plan with your clinician — especially if you take prescription medication or have a chronic condition.