Substrate ·evidence-based
interventions / CoQ10 / energy / fatigue

Does CoQ10 help energy / fatigue? (Grade C evidence)

For energy / fatigue, CoQ10 sits at Grade C — a hint of benefit in limited trials, especially in adults, low certainty, at doses 100–200 mg/day.

Exact question reviewed

Population
adults
Intervention
CoQ10 · 100–200 mg/day
Comparator
not reported
Outcome
energy / fatigue
Time horizon
not reported

Bottom line. For energy / fatigue, CoQ10 sits at Grade C — a hint of benefit in limited trials, especially in adults, low certainty, at doses 100–200 mg/day. [1 RCT]

Direction
benefit
Magnitude
limited evidence for general fatigue; clearer in specific conditions (e.g., statin myalgia, mitochondrial disorders)
Grade
C
Certainty
low
Clinical meaning
small but potentially useful
Who it applies to
adults
Dose / form studied
100–200 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_coq_energy 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: 100–200 mg/day.

Evidence

StudyDesignRoleCite
Effectiveness of Coenzyme Q10 Supplementation for Reducing Fatigue: A Systematic Review and Meta-analysispeer-reviewednot classifiedPMID:36091835

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_coq_energy
Claim version
not reported
Governance
legacy, not verified
Last evidence search
not reported
Last editorial review
2026-07-16T05:20:23.359Z

Public receipt · Machine-readable claim · Methodology

Dose & form

Studied intake: 100–200 mg/day.

How it stacks up for energy / fatigue

Grade history

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

Frequently asked

How long does CoQ10 take to work for energy / fatigue?

Trials of CoQ10 for energy / fatigue 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 CoQ10 for energy / fatigue?

Studied doses for CoQ10 in energy / fatigue trials cluster around 100–200 mg/day. See the dose block for the specific range and how it varies by form.

Does CoQ10 work for energy / fatigue if I'm not deficient?

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

CoQ10 or the next-best alternative for energy / fatigue?

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
limited evidence for general fatigue; clearer in specific conditions (e.g., statin myalgia, mitochondrial disorders)
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 CoQ10 help energy / fatigue? (Grade C). https://evidencebased.info/interventions/coq10/energy. Updated 2026-07-16.
BibTeX
@misc{substrate_rventionscoq10energy,
  author = {Substrate editorial},
  title  = {Does CoQ10 help energy / fatigue?},
  year   = {2026},
  url    = {https://evidencebased.info/interventions/coq10/energy},
  note   = {Grade C, evidencebased.info}
}

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