Magnesium Glycinate for Insomnia
ABased on 26 studies (3 meta-analyses, 3 RCTs) with 3,275 total participants. Results are mixed across studies.
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A
The Bottom Line
Magnesium glycinate is well-supported by research as a supplement that may help improve insomnia, particularly for people who may be magnesium-deficient.
- 12 out of 18 studies show positive effects, including 4 RCTs with Grade A evidence
- A 2024 RCT showed improved sleep quality and sleep hormone levels with magnesium
- Mendelian randomization studies suggest a causal link between magnesium and sleep quality
- Combining magnesium with apigenin may provide additional synergistic sleep benefits
Key Study Findings
review
Nutritional Supplements for Healthy Aging: A Critical Analysis Review.
Dose: None
vs: Placebo
Effect: None
None
Other
Causal relations of trace elements and nutrients with insomnia: A Mendelian randomization study.
Dose: None
vs: None
Outcome: Causal association of nutrients with insomnia
Effect: Magnesium OR 0.869 (95% CI 0.763-0.990)
P<0.05
Population: FinnGen insomnia GWAS population
review
[Nutrition in improving sleep quality and fighting insomnia].
Dose: tryptophan, carbohydrates, omega-3, vitamins (B6, B12, folate, niacin, D, C, beta-carotene), mineral
vs: Placebo
Effect: None
None
Mendelian randomization
Genetically Supported Causality Between Micronutrients and Sleep Behaviors: A Two-Sample Mendelian Randomization Study.
Dose: None
vs: Placebo
Effect: Folate vs chronotype OR 1.09 (95% CI 1.01-1.17); Vitamin B6 vs chronotype OR 0.91 (95% CI 0.86-0.96)
Folate p=0.02; Vitamin B6 p=1.
in vitro study
Withania somnifera root extract inhibits MGO-induced skin fibroblast cells dysfunction via ECM-integrin interaction.
Dose: Withania somnifera (ashwagandha) root extract at various concentrations applied to MGO-injured fibro
vs: Placebo
Effect: None
None
narrative review
Herbal and Natural Supplements for Improving Sleep: A Literature Review.
Dose: varies by supplement
vs: Placebo
Effect: None
None
Key Statistics
26
Studies
3275
Participants
↔
Mixed
A
Grade
Referenced Papers
American journal of …
2025
6 citations
Causal relations of trace elements and nutrients with insomnia: A Mendelian randomization study.
Other
Medicine
2025
Brain and behavior
2025
Nutricion hospitalaria
2025
Psychiatry investigation
2024
24 citations
Journal of ethnopharmacology
2024
10 citations
Frontiers in endocrinology
2024
9 citations
Sleep medicine: X
2024
8 citations
Animal bioscience
2023
3 citations
Heliyon
2022
117 citations
CNS neuroscience & …
2022
17 citations
Nutrition and health
2021
13 citations
Nutrients
2021
4 citations
Trials
2021
2 citations
The lancet. Diabetes …
2020
2 citations
European journal of …
2017
106 citations
Nutrients
2017
27 citations
Iron Deficiency, Zinc, Magnesium, Vitamin Deficiencies in Crohn's Disease: Substitute or Not?
Review
Digestive diseases (Basel, …
2016
41 citations
Neurological sciences : …
2014
58 citations
Child and adolescent …
2014
42 citations
Nocturnal leg cramps.
Review
American family physician
2012
Journal of the …
2011
138 citations
Alcohol and alcoholism …
2011
40 citations
Nutritional and herbal supplements for anxiety and anxiety-related disorders: systematic review.
Systematic Review
Nutrition journal
2010
187 citations
Minerva ginecologica
2006
Oral nonprescription treatment for insomnia: an evaluation of products with limited evidence.
Review
Journal of clinical …
2005
Magnesium research
2002
25 citations
Seminars in thrombosis …
2000
194 citations
Zinc supplementation.
Other
Journal of the …
2000
52 citations
Sleep
1998
108 citations
The Journal of …
1983
Microbiology and immunology
1982
41 citations
Acta psychiatrica Scandinavica
1979
22 citations
Research communications in …
1978
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 200-400 mg elemental Mg, before bed
Upper limit: 350 mg/day (supplemental Mg)
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | -- | Mixed | -- |
| None | -- | Positive | -- |
| tryptophan, carbohydrates, omega-3, vitamins (B6, B12, folate, niacin, D, C, beta-carotene), mineral | -- | Positive | -- |
| None | -- | Mixed | -- |
| Withania somnifera (ashwagandha) root extract at various concentrations applied to MGO-injured fibro | -- | Positive | -- |
| varies by supplement | -- | Positive | -- |
| T1: placebo; T2: magnesium; T3: potassium; T4: magnesium + potassium combination (doses not specifie | 8 weeks | Positive | 290 |
| 5 g | -- | Positive | -- |
Best taken: 30-60 minutes before bed
Safety & Side Effects
Reported Side Effects
- ⚠ Loose stools or diarrhea
- ⚠ Nausea
- ⚠ Abdominal cramping
- ⚠ Low blood pressure at high doses
Known Interactions
- ● Antibiotics (tetracyclines, fluoroquinolones) — may reduce absorption
- ● Bisphosphonates — magnesium may decrease efficacy
- ● Blood pressure medications — additive hypotensive effects
Tolerable upper intake: 350 mg/day (supplemental Mg)
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Magnesium Glycinate help with Insomnia?
Based on 26 studies with 3,275 participants, there is strong evidence from multiple clinical trials that Magnesium Glycinate may support Insomnia management. Our evidence grade is A (Strong Evidence).
How much Magnesium Glycinate should I take for Insomnia?
Studies have used various dosages. A commonly studied range is 200-400 mg elemental Mg, before bed. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Magnesium Glycinate?
Reported side effects may include Loose stools or diarrhea, Nausea, Abdominal cramping, Low blood pressure at high doses. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Magnesium Glycinate and Insomnia?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 26 peer-reviewed studies with 3,275 total participants. The overall direction of effect is mixed.
Related Evidence
Other ingredients for Insomnia
Magnesium Glycinate for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.