Substrate ·evidence-based
interventions / Zinc / mood

Does Zinc help mood? (Grade C evidence)

Zinc shows a Grade C benefit for mood: small trials, especially in adults suggest a modest effect, low certainty. Dose range 25 mg/day.

Exact question reviewed

Population
adults
Intervention
Zinc · 25 mg/day
Comparator
not reported
Outcome
mood
Time horizon
not reported

Bottom line. Zinc shows a Grade C benefit for mood: small trials, especially in adults suggest a modest effect, low certainty. Dose range 25 mg/day. [1 RCT]

Direction
benefit
Magnitude
may augment antidepressant response; deficiency-correction likely matters
Grade
C
Certainty
low
Clinical meaning
small but potentially useful
Who it applies to
adults
Dose / form studied
25 mg/day
Safety
not assessed
The one limitation
Claim-specific limitation details are not available in this public record.

Reviewed · Evidence last changed · Claim clm_ec_b2-zinc-mood v0

Grade
C
what does the grade mean?
Certainty
low
what does certainty mean?

Grade C / low: hints of benefit in small trials; a well-run RCT could easily push this to B or to null.

Who it works for

Best-studied in adults. Recorded studied dose: 25 mg/day.

Evidence

StudyDesignRoleCite
Zinc in depression: From development to treatment: A comparative/ dose response meta-analysis of observational studies and randomized controlled trials.peer-reviewednot classifiedPMID:32829928

Why this grade

Reasoning trace

The current record stores Grade C at low certainty and links 1 publishable source. A claim-specific domain-by-domain grading rationale is not available in this public record, so no reason for upgrading or downgrading is inferred here.

Audit and version

Claim ID
ec_b2-zinc-mood
Claim version
not reported
Governance
legacy, not verified
Last evidence search
not reported
Last editorial review
2026-06-05T02:57:53.365Z

Public receipt · Machine-readable claim · Methodology

Dose & form

Studied intake: 25 mg/day.

How it stacks up for mood

Grade history

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

Frequently asked

How long does Zinc take to work for mood?

Trials of Zinc 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 Zinc for mood?

Studied doses for Zinc in mood trials cluster around 25 mg/day. See the dose block for the specific range and how it varies by form.

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

The effect concentrates in adults. If your baseline is normal, expect a smaller effect than the trial averages.

Zinc 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
may augment antidepressant response; deficiency-correction likely matters
Substrate's interpretation
The current reviewed record assigns Grade C at low certainty. A domain-by-domain rationale is shown only when recorded.
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

Citation is encouraged. The proposed reuse license is CC-BY-4.0; status: pending-governance-ratification.

Plain-text citation
Substrate. Does Zinc help mood? (Grade C). https://evidencebased.info/interventions/zinc/mood. Updated 2026-07-16.
BibTeX
@misc{substrate_nterventionszincmood,
  author = {Substrate editorial},
  title  = {Does Zinc help mood?},
  year   = {2026},
  url    = {https://evidencebased.info/interventions/zinc/mood},
  note   = {Grade C, evidencebased.info}
}

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