Substrate ·evidence-based
interventions / Magnesium / bone health

Does Magnesium help bone health? (Grade C evidence)

Magnesium may modestly help bone health in specific populations (Grade C, low certainty), especially in older adults. Dose range: not standardized.

Exact question reviewed

Population
older adults
Intervention
Magnesium · not standardized
Comparator
not reported
Outcome
bone health
Time horizon
not reported

Bottom line. Magnesium may modestly help bone health in specific populations (Grade C, low certainty), especially in older adults. Dose range: not standardized. [1 RCT]

Direction
benefit
Magnitude
Systematic review in older adults: higher magnesium status/intake is associated with greater bone mineral density and, in some studies, lower fracture risk. Evidence is largely observational, so the association does not establish that supplementation prevents fractures.
Grade
C
Certainty
low
Clinical meaning
small but potentially useful
Who it applies to
older adults
Dose / form studied
not standardized
Safety
minor_with_ssri
The one limitation
Claim-specific limitation details are not available in this public record.

Reviewed · Evidence last changed · Claim clm_ec_b5-mg-bone v0

⚠ Safety in context

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 older adults. Recorded studied dose: not standardized.

Evidence

StudyDesignRoleCite
Impact of magnesium on bone health in older adults: A systematic review and meta-analysis.peer-reviewedsupportsPMID:34666201

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_b5-mg-bone
Claim version
not reported
Governance
legacy, not verified
Last evidence search
not reported
Last editorial review
2026-07-16T15:19:31.286Z

Public receipt · Machine-readable claim · Methodology

Dose & form

Studied intake: not standardized.

Full dose & form comparison for Magnesium →

How it stacks up for bone health

Grade history

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

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

Frequently asked

How long does Magnesium take to work for bone health?

Trials of Magnesium for bone health 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 bone health?

Studied doses for Magnesium in bone health trials cluster around not standardized. See the dose block for the specific range and how it varies by form.

Does Magnesium work for bone health if I'm not deficient?

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

Magnesium or the next-best alternative for bone health?

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
Systematic review in older adults: higher magnesium status/intake is associated with greater bone mineral density and, in some studies, lower fracture risk. Evidence is largely observational, so the association does not establish that supplementation prevents fractures.
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 Magnesium help bone health? (Grade C). https://evidencebased.info/interventions/magnesium/bone. Updated 2026-07-16.
BibTeX
@misc{substrate_entionsmagnesiumbone,
  author = {Substrate editorial},
  title  = {Does Magnesium help bone health?},
  year   = {2026},
  url    = {https://evidencebased.info/interventions/magnesium/bone},
  note   = {Grade C, evidencebased.info}
}

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