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The Best Sleep Supplements: Melatonin, Magnesium, and More

Struggling to catch those Zzz's? You're not alone. This guide breaks down the best sleep supplements backed by science, from melatonin to magnesium, to help you find the right natural sleep aid.

CS
Research Team
Check Supplement
December 25, 2025
The Best Sleep Supplements: Melatonin, Magnesium, and More
Quick Answer Mostly Yes

What are the best supplements for sleep?

The best supplements for sleep include melatonin, magnesium, L-theanine, and ashwagandha, all of which have different mechanisms for promoting relaxation and improving sleep quality.

  • Melatonin regulates the sleep-wake cycle.
  • Magnesium promotes muscle relaxation and nerve function.
  • L-Theanine reduces anxiety and improves sleep quality.
Read full explanation
Tossing and turning all night? We've all been there. Finding the right sleep supplement can be tricky, so let's look at the research on some popular options to help you drift off more easily.
01

Melatonin: The Sleep Hormone

Melatonin is a hormone that regulates your sleep-wake cycle. Supplementing can help when your natural melatonin production is disrupted, like with jet lag or shift work.
- A typical dose is 0.3–5 mg taken 30–60 minutes before bedtime. Some studies show higher doses don't necessarily improve effectiveness, so start low.
- Keep in mind that melatonin primarily affects sleep onset, not necessarily sleep duration.

Quick Tips

  • Start with a low dose of melatonin (0.3-1mg) to assess your sensitivity.
  • Take melatonin at the same time each night to regulate your circadian rhythm.
02

Magnesium: Relaxation Mineral

Magnesium plays a role in muscle relaxation and nerve function, which can promote sleep. Many people are deficient in magnesium, making supplementation potentially beneficial.
- Magnesium glycinate and magnesium threonate are often recommended for sleep, as they are easily absorbed and less likely to cause digestive issues.
- Look for dosages around 200-400 mg before bed. Some studies show that magnesium can reduce the time it takes to fall asleep.

Quick Tips

  • Choose magnesium glycinate or threonate for better absorption.
  • Pair magnesium with other relaxation-promoting supplements like L-theanine.
03

L-Theanine: Calm and Focus

L-Theanine is an amino acid found in green tea that promotes relaxation without causing drowsiness. It can help reduce anxiety and improve sleep quality.
- Studies suggest that 100-200 mg of L-theanine before bed can help you fall asleep faster and improve sleep efficiency.
- L-Theanine works by increasing alpha brain waves, which are associated with a relaxed and focused state.

Quick Tips

  • Try L-theanine during the day to reduce anxiety without causing drowsiness.
  • Combine L-theanine with other sleep aids like magnesium for a synergistic effect.
04

Ashwagandha: Stress Buster

Ashwagandha is an adaptogen that can help your body cope with stress. Chronic stress can disrupt sleep, so ashwagandha may indirectly improve sleep quality.
- Studies using Ashwagandha (KSM-66) at doses of 300-500 mg before bed have shown improvements in sleep latency (time to fall asleep) and sleep quality.
- Ashwagandha can also help reduce cortisol levels, which are often elevated in people with chronic stress.

Quick Tips

  • Choose a standardized ashwagandha extract like KSM-66 for consistent results.
  • Give ashwagandha a few weeks to build up in your system for optimal effects.
05

Other Sleep Supplement Considerations

While melatonin, magnesium, L-theanine, and ashwagandha are popular, other supplements may also help some individuals. Consider these:
- Apigenin: Found in chamomile, may promote relaxation.
- 5-HTP: A precursor to serotonin and melatonin, potentially improving sleep.
- Beta Glucan: May indirectly improve sleep by supporting gut health and reducing inflammation.

Quick Tips

  • Experiment with different supplements to find what works best for you.
  • Consult with a healthcare professional before starting any new supplement regimen.

Key Takeaways

Finding the best sleep supplements depends on your individual needs. Melatonin, magnesium, L-theanine, and ashwagandha are all research-backed options to consider. Don't forget to check how your current supplements may be interacting!

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