Dietary Magnesium Intake in Relation to Depression in Adults: A GRADE-Assessed Systematic Review and Dose-Response…
The magnesium-and-depression link comes from what people eat, not from supplements — is there any reason to think a pill would do what a better diet appears to be associated with?
Well-supported by good-quality research. how we score evidence
Caveat on this rating: Entirely observational. Mostly cross-sectional studies, which cannot establish that low magnesium came before the depression rather than after it, and dietary magnesium intake is a proxy for overall diet quality, socioeconomic position, and physical activity. No supplement was tested in any of the pooled studies.
Oral magnesium sold for mood, anxiety, or sleep is a dietary supplement under the Dietary Supplement Health and Education Act of 1994 (DSHEA).
Pooling 10 cross-sectional and 3 cohort studies covering 63,214 adults, people in the highest category of dietary magnesium intake had a 34% lower risk of depression than those in the lowest (relative risk 0.66, 95% CI 0.57-0.78), and each additional 100 mg/day of dietary magnesium was associated with 7% lower risk (RR 0.93, 95% CI 0.90-0.96). This is an association between what people eat and how they feel, not evidence that a magnesium pill treats depression — depression itself changes appetite and diet quality, and magnesium-rich diets are also rich in everything else that comes with vegetables, nuts, and whole grains.
Worth asking
The magnesium-and-depression link comes from what people eat, not from supplements — is there any reason to think a pill would do what a better diet appears to be associated with?
Source
Dietary Magnesium Intake in Relation to Depression in Adults: A GRADE-Assessed Systematic Review and Dose-Response Meta-analysis of Epidemiologic Studies. — Hajhashemy Z, Shirani F, Askari G. (2025)
Reputable peer-reviewed journal
Read the source: https://doi.org/10.1093/nutrit/nuae056
DOI: 10.1093/nutrit/nuae056
How this was scored
- Study design
- Systematic review of observational studies
- Funding
- Independently funded
- Published in
- Reputable peer-reviewed journal
- Sample size
- 63,214
- Preregistered
- Yes
- Conflicts disclosed
- No
- Independent of proponent
- Yes
- Retracted
- No
Read the full scoring rubric, including what it can't tell you.
Published August 19, 2026.
Where we put this study in context
Questions
How strong is the evidence behind this?
Resolv rates this source "strong evidence". Well-supported by good-quality research. It scores 82 out of 100 on our published rubric. One caveat travels with that badge: Entirely observational. Mostly cross-sectional studies, which cannot establish that low magnesium came before the depression rather than after it, and dietary magnesium intake is a proxy for overall diet quality, socioeconomic position, and physical activity. No supplement was tested in any of the pooled studies. The score is calculated from recorded facts about the source — study design, funding, publication venue, sample size, preregistration — not typed in by an editor.
What is the source for this?
Dietary Magnesium Intake in Relation to Depression in Adults: A GRADE-Assessed Systematic Review and Dose-Response Meta-analysis of Epidemiologic Studies. — Hajhashemy Z, Shirani F, Askari G. (2025). Published in: Reputable peer-reviewed journal. DOI: 10.1093/nutrit/nuae056. The full source is linked on this page so you can read it yourself.
Who paid for this research, and does that matter?
Study design: Systematic review of observational studies. Funding: Independently funded. The researchers were independent of whoever benefits from the result. Industry sponsorship is one of the most reliably measured biases in medicine, which is why funding carries real weight in the score rather than sitting in a footnote.
Is magnesium, magnesium glycinate, magnesium citrate, magnesium oxide, magnesium chloride, magnesium aspartate, magnesium l-threonate, magtein, epsom salts FDA approved for this use?
No. Its current status is: Not FDA-evaluated for this use. Oral magnesium sold for mood, anxiety, or sleep is a dietary supplement under the Dietary Supplement Health and Education Act of 1994 (DSHEA).
Is this medical advice?
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.
This is information to bring to your prescriber, not medical advice and not a reason to change anything on your own. Nothing here is an instruction to stop or reduce a medication. If you are in crisis, call or text 988.