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CoQ10

73
evidence score
supplement
247 studies
Coenzyme Q10ubiquinolubiquinone+2 more

Coenzyme Q10 (CoQ10) is a fat-soluble quinone compound endogenous to mitochondrial inner membranes, serving as an essential electron carrier in the respiratory chain (complexes I–III) and a lipophilic antioxidant. Endogenous synthesis declines with age and is depleted by statins (HMG-CoA reductase inhibition blocks the CoQ10 synthesis pathway). Clinical evidence supports: reduced blood pressure in hypertension, reduced statin-associated myopathy with co-supplementation, and potential benefit in heart failure (Q-SYMBIO trial). Ubiquinol form (reduced) has superior bioavailability vs. ubiquinone, especially in older adults. Used broadly for cardiovascular health, mitochondrial function, anti-aging, and statin myopathy prevention. Safe and well-tolerated.

Evidence

Moderate evidence

Safety

Unknown safety profile

Clinical Status

Phase II

Last Sync

Feb 19, 2026

Last Reviewed

Not reviewed yet

Physician Notes

Ubiquinol form is better absorbed than ubiquinone. 200mg/day is the standard dose. Higher doses (400mg) for migraine prevention. Always supplement if on statins.

FDA Status:Available as OTC supplement. Ubiquinol form has better absorption.

Monitoring

  • No specific labs
  • CoQ10 serum level if clinically indicated
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Dosing

Typical
200 mg
100 mgRange600 mg
FrequencyOnce or twice daily with fat-containing meal

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Pharmacology

Half-life~33 hours (ubiquinol)
OnsetPlasma CoQ10 rises within days; clinical effects over 4–12 weeks
DurationRequires continued supplementation to maintain elevated levels
Routes
oral

Evidence Score

73
Level B — Moderate
247 studies indexed · 7 meta-analyses
Scoring Factors
Volume(24%)~48/100
Quality(24%)~50/100
Sample Size(12%)~94/100
Consistency(14%)~94/100
Replication(8%)~94/100
Recency(18%)~94/100

Scores estimated from study counts. Exact breakdown computed after research sync.

Evidence Levels
AScore ≥75 with at least 1 meta-analysis and 3+ RCTs
BScore ≥50 with at least 1 RCT or meta-analysis
CScore ≥25 — observational or animal evidence only
DScore <25 — very limited or preclinical data

Plain-English Snapshot

CoQ10 is currently categorized as a supplement compound.

Evidence is moderate (73/100): promising signal from 247 indexed studies, but context and population still matter.

Safety scoring is incomplete. Start conservatively and monitor carefully.

Core mechanism

Electron shuttle in mitochondrial ETC (complex I-III); lipophilic antioxidant protecting cell membranes; regenerates vitamins C and E; replenishes statin-depleted CoQ10

Practical Context

Strongest current signals

  • Level A: Clinical efficacy of adjunctive use of coenzyme Q10 in non-surgical periodontal treatment: A systematic review.
  • Level C: The protective effects of coenzyme Q10 on blood pressure: a narrative review of anti-inflammatory and antioxidant mechanisms.
  • Level C: Coenzyme Q10 and Cognition: A Review.

Compound Profile