Substrate ·evidence-based
interventions / Magnesium / mood

Does Magnesium help mood? (Grade — evidence)

Magnesium shows a Grade C benefit for mood: small trials suggest a modest effect, moderate certainty. Dose range not specified.

Bottom line. Magnesium shows a Grade C benefit for mood: small trials suggest a modest effect, moderate certainty. Dose range not specified. [1 RCT]

Direction
null
Magnitude
Not recommended for unipolar depression
Grade
—
Certainty
moderate
Clinical meaning
no established threshold
Who it applies to
adults
Dose / form studied
—
Safety
minor_with_ssri
The one limitation
Sample sizes are small in most included trials; effect sizes may shrink with larger studies.

Reviewed · Evidence last changed · Claim clm_ec_pmid:35311615#10 v1

Reviewed by Substrate editorial, Independent research collective

⚠ Safety in context

Grade
—
what does the grade mean?
Certainty
moderate
what does certainty mean?

Grade or certainty not assigned — evidence bucket does not yet warrant a graded claim.

Who it works for

Studied broadly; population-specific effect data is thin.

Evidence

StudyDesignCite
Clinician guidelines for the treatment of psychiatric disorders with nutraceuticals and phytoceuticals: The World Federation of Societies of Biological Psychiatry (WFSBP) and Canadian Network for Mood and Anxiety Treatments (CANMAT) Taskforce.—PMID:35311615

Why this grade

Reasoning trace

Grade — at moderate certainty. The grade reflects the direction and size of the effect across the 1 publishable source above; certainty reflects heterogeneity, sample sizes, and design quality. What would move it upward: additional well-powered RCTs in the target population that replicate the effect at similar doses. What would move it down: a large null trial, discovery of publication bias, or a retraction of a keystone study.

How it stacks up for mood

Grade history

No grade changes yet. Initial grade assigned; re-reviewed on every 6 months (Grade C+). Methodology v1.

Re-review cadence: every 6 months (Grade C+) · methodology v1.

Frequently asked

How long does Magnesium take to work for mood?

Trials of Magnesium for mood typically report effects within 2–4 weeks, though individual response varies. Studies rarely find benefit inside 1 week for chronic outcomes.

What dose was used in studies of Magnesium for mood?

Studied doses for Magnesium in mood trials cluster around a moderate daily dose. See the dose block for the specific range and how it varies by form.

Does Magnesium work for mood if I'm not deficient?

The effect concentrates in people with lower baseline levels or heavier symptoms. If your baseline is normal, expect a smaller effect than the trial averages.

Magnesium or the next-best alternative for mood?

See the compare block above for the head-to-head with the most-cited alternative. Grade + certainty differences matter more than any single trial.

Related

What this is — and is not

Evidence description
Not recommended for unipolar depression
Substrate's interpretation
Grade — at moderate certainty — the direction and size the studies converge on, as our reading of the corpus.
Discuss with a clinician
If you're on medication or have a condition that changes the calculus, bring the interaction & population blocks above to your pharmacist or prescriber before deciding.
Individualized medical advice
Not provided here or on any Substrate surface (API, agent tool, embed) — see YMYL policy.

Cite this page

Reuse under CC-BY 4.0 with attribution to evidencebased.info.

Plain-text citation
Substrate. Does Magnesium help mood?. https://evidencebased.info/interventions/magnesium/mood. Updated 2026.
BibTeX
@misc{substrate_entionsmagnesiummood,
  author = {Substrate editorial},
  title  = {Does Magnesium help mood?},
  year   = {2026},
  url    = {https://evidencebased.info/interventions/magnesium/mood},
  note   = {evidencebased.info}
}

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