Best supplements for sleep.

The most evidence-backed supplements for falling asleep faster and sleeping more deeply, and how to take them. Sleep supplements work best alongside good sleep habits, not instead of them.

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Each pick is evidence-graded · we don't sell supplements
  1. 1Magnesium GlycinateStrongBioavailable, gentle, non-laxative magnesium. Supports deep sleep, calms the nervous system, eases muscle tension.400 mg elemental · evening · ~$14/mo
  2. 2Ashwagandha KSM-66StrongA clinically-studied adaptogen that lowers cortisol under chronic stress while preserving daytime alertness.600 mg standardised · evening · ~$17/mo
  3. 3MelatoninStrongThe body's master sleep hormone. Low physiological doses (0.3-0.5 mg) outperform high doses for sleep onset.0.3-0.5 mg · evening · ~$7/mo
  4. 4Magnesium CitrateStrongHigher-absorption, mildly laxative form of magnesium. A solid daily option when bowel regularity is also a goal.400 mg elemental · evening · ~$11/mo
  5. 5GlycineModerateLowers core body temperature at night to deepen sleep. Helps with sleep onset and quality of restorative sleep.3 g · evening · ~$11/mo
  6. 6TaurineStrongConditionally-essential amino acid that supports cardiovascular function, electrical signaling in muscles, and neurological calm.2000 mg · evening · ~$12/mo
  7. 75-HTPModerateDirect precursor to serotonin and melatonin. May support mood and sleep onset, use cautiously, not with SSRIs.100 mg · evening · ~$14/mo
  8. 8ZMAModerateClassic recovery stack for active individuals. Zinc and magnesium often run low in heavy trainers, replenishing supports sleep and hormone production.30 mg Zn / 450 mg Mg / 11 mg B6 · evening · ~$14/mo
  9. 9Reishi MushroomModerateThe 'mushroom of immortality' in Taoist tradition. Supports relaxation, sleep quality, and balanced immune signaling.1000 mg · evening · ~$22/mo
  10. 10Magnesium L-ThreonateModerateThe only magnesium form clinically shown to raise brain magnesium levels, supports memory, learning, and deep sleep.2000 mg (144 mg elemental) · evening · ~$38/mo
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Common questions

What is the best supplement for sleep?
Magnesium glycinate and glycine are among the best-evidenced for sleep quality, with L-theanine for calming the mind and low-dose melatonin (0.5-1 mg) for sleep timing. The right one depends on whether your issue is falling asleep or staying asleep.
Is melatonin safe to take every night?
Short-term use of low-dose melatonin is generally considered safe for most adults, but it's best used occasionally or for resetting sleep timing rather than indefinitely. Talk to a clinician for ongoing sleep problems.

Educational use only, not medical advice. Always consult a qualified clinician before starting supplements, especially if you take medication or are pregnant or nursing.