The Study
Magnesium Bisglycinate Supplementation in Healthy Adults Reporting Poor Sleep: A Randomized, Placebo-Controlled Trial
This is a strong type of test where people are randomly put into two groups: one gets the real supplement and the other gets a fake pill that looks the same. Neither the people nor the researchers know who got which until the end. The people who took the real supplement said they slept a little better, but the improvement was small and not huge. So we can say the supplement might help a bit, but we can't say it definitely fixes sleep problems.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
This study tested if taking a magnesium supplement (magnesium bisglycinate) every day for a month improves sleep in people who say they sleep poorly. They gave half the people magnesium and the other half a fake pill (placebo). They used a questionnaire to measure sleep problems.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 590 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1The improvement was modest and might not be noticeable for everyone.
- 2It's not a magic solution for insomnia, but it might help some people a little.
- 3People taking magnesium had a slightly bigger improvement in their sleep problem score than those taking the fake pill.
- 4The improvement was about 4 points on a scale, while the fake pill group improved about 2 points.
- 5But this difference was small, and many people didn't notice a big change.
- 6Also, the magnesium didn't help with other things like daytime sleepiness or mood.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nature and Science of Sleep
Year
2025
Authors
Julius Schuster, Igor Cycelskij, Adrian Lopresti, Andreas Hahn
Related Content
Claims (6)
Taking a magnesium pill every day for a month helps people who don't sleep well sleep a bit better. It's not a huge change, but it's a real improvement.
Taking 250 mg of magnesium daily for a month helps some people sleep better. In a study, about 19 out of 100 people who took magnesium showed a big improvement in their sleep problems, while only 11 out of 100 people taking a sugar pill (placebo) improved that much. So a small number of people can get real benefit from this supplement.
Taking a magnesium supplement every day for 4 weeks doesn't make a real difference in sleep quality, daytime sleepiness, tiredness, mood, stress, or symptoms of depression and anxiety in healthy adults who have trouble sleeping. When compared to a pill with no active medicine, the results are about the same.
Taking a magnesium supplement for 4 weeks can improve sleep problems, but the average score on a sleep questionnaire still shows some insomnia. So the supplement by itself does not cure insomnia for most people.
In adults who don't sleep well, we looked at how much magnesium they get from their diet. After taking a magnesium supplement for 4 weeks, we found that people who had less magnesium in their diet saw more improvement in their sleep problems than those who already had plenty of magnesium.
Taking magnesium glycinate, a type of magnesium supplement, helps adults who have trouble sleeping to sleep better and lowers their insomnia symptoms.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.