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Magnesium for Sleep: Does It Really Help You Fall Asleep Faster?

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March 13, 2025

Magnesium for Sleep: Does It Really Help You Fall Asleep Faster?

Medically reviewed by: 

Dr. Shiyan Ooi

School of Medical Sciences, University of Manchester

Magnesium is an essential mineral involved in hundreds of bodily processes, including muscle relaxation and nervous system regulation. Many people use magnesium supplements to help with sleep, but does it really work?

How Magnesium Affects Sleep

Magnesium plays a crucial role in sleep by:

  • Regulating melatonin, the hormone responsible for sleep-wake cycles
  • Enhancing GABA, a neurotransmitter that promotes relaxation
  • Reducing cortisol levels, which can interfere with sleep

Studies suggest that magnesium deficiency can lead to insomnia and restless sleep (National Institutes of Health).

Best Forms of Magnesium for Sleep

Different forms of magnesium have varying levels of absorption and effectiveness for sleep:

  • Magnesium Glycinate: Highly absorbable and known for its calming effects.
  • Magnesium Citrate: Helps with muscle relaxation but may have a laxative effect.
  • Magnesium L-Threonate: Supports brain function and may improve sleep quality.

How to Take Magnesium for Sleep

For best results, magnesium should be taken:

  • 30-60 minutes before bedtime
  • With a light snack to aid absorption
  • At a dosage of 200-400 mg daily, depending on individual needs

Consult a healthcare provider before taking magnesium supplements, especially if you have kidney disease or are on medication.

Natural Sources of Magnesium

Magnesium can also be obtained through a diet rich in:

  • Leafy greens (spinach, kale)
  • Nuts and seeds (almonds, pumpkin seeds)
  • Whole grains (brown rice, quinoa)
  • Bananas and avocados

Magnesium vs. Other Sleep Aids

Compared to other sleep aids, magnesium is natural, non-habit forming, and supports overall health. It is often used alongside melatonin or L-theanine for enhanced relaxation.

Conclusion

Magnesium is a promising supplement for improving sleep quality. While research supports its benefits, individuals should ensure adequate dietary intake and consult a healthcare professional for personalized recommendations.

Dr. Shiyan Ooi

Dr. Shiyan Ooi is a medical doctor with over a decade of experience treating patients with chronic conditions. She graduated from the University of Manchester with a Bachelor of Medicine and Surgery (MBChB UK) and spent several years working at the National Health Service (NHS) in the United Kingdom, several Singapore government hospitals, and private functional medicine hospitals. Dr. Ooi specializes in root cause analysis, addressing hormonal, gut health, and lifestyle factors to treat chronic conditions. Drawing from her own experiences, she is dedicated to empowering others to optimize their health. She loves traveling, exploring nature, and spending quality time with family and friends.