supplist/supplements/CoQ10

CoQ10

Coenzyme Q10 (ubiquinone / ubiquinol)

Evidence is modest and scattered rather than anchored by one standout cardiovascular area. The strongest current signals are for male fertility parameters and statin-related muscle symptoms, while heart failure and migraine now look more mixed than older summaries suggested. The popular ubiquinol-vs-ubiquinone debate is still more marketing than clinical data.

What the research says

Each row is a different health effect. A means the support looks strongest, B likely helpful, C mixed or modest, and — not enough human evidence yet.

B · Likely helpful
B
Male fertility & sperm parameters
12 papers, only 1 passed quality filter. Some signal for sperm motility at 200–400 mg/day, but there is not enough human evidence to grade it.
12 papers · 5 research reviews
C · Mixed or limited evidence
C
Heart failure (CHF)
Cochrane review supports modest improvement in heart pumping efficiency and reduced overall mortality. The landmark Q-SYMBIO trial drives much of the signal.
29 papers · 16 research reviews
C
Exercise performance & fatigue
3 of 3 reviews positive. Modest improvements in VO2 max, time-to-exhaustion, and post-exercise fatigue. Larger effects in older adults and statin users.
35 papers · 7 research reviews
C
Migraine prevention
2 of 4 reviews positive, 2 mixed. Reduces monthly migraine days at 300+ mg/day for 12+ weeks. Used clinically as second-line preventative.
8 papers · 4 research reviews
C
Statin-induced myopathy
Reviews disagree. Newer 2025 meta-analyses show CoQ10 reduces statin-associated muscle pain intensity, but earlier reviews found no effect on CK or symptoms.
15 papers · 8 research reviews
C
Blood pressure & hypertension
Reviews disagree. A modest blood-pressure reduction in some pooled analyses, no effect in others. Larger benefits at higher doses (200+ mg/day).
26 papers · 14 research reviews
C
Neurodegenerative disease (Parkinson’s, Alzheimer’s, Huntington’s)
12 papers, only 2 passed quality filter. High-dose Parkinson’s trials largely null. Currently insufficient for a grade.
12 papers · 4 research reviews
— · Not enough human evidence yet
—
Mitochondrial diseases (inherited disorders)
Only 3 human papers — not enough to grade. Used clinically in some inherited mitochondrial disorders, rigorous trial data sparse.
3 papers · 1 research review

Quick facts

Dose, form and timing based on trials in the database.

Typical dose
100–300 mg/day; heart failure trials commonly use 100 mg three times daily (Q-SYMBIO protocol)
Best taken
With food, ideally a meal containing fat. CoQ10 is fat-soluble and absorption is poor without lipid co-administration
Form
Ubiquinone (oxidized) and ubiquinol (reduced) both effective. Ubiquinol claims better bioavailability but head-to-head clinical superiority is not consistently shown. Solubilized formulations absorb better than dry capsules
Common side effects
Mild stomach discomfort, headache, insomnia at high doses. Generally very well-tolerated
Drug interactions
May reduce effectiveness of warfarin (vitamin K-like activity). May lower blood pressure additively with antihypertensives. Statins lower endogenous CoQ10 — supplementation often used to counteract
Statin context
Statins reduce CoQ10 synthesis. CoQ10 supplementation does not reverse all statin myopathy, but newer reviews suggest meaningful pain reduction in symptomatic patients

Quality-verified products

Products that pass third-party quality testing.

Product quality data coming soon

Product recommendations are being built from USP Verified, NSF Certified, and Labdoor test data. Products will only appear here after the supplement itself clears the evidence bar above — and only if the product passes third-party purity testing.

How we graded CoQ10

Grades come from 125 unique research papers indexed from PubMed — including 27 meta-analyses, 22 systematic reviews, 2 Cochrane reviews, and 74 randomized trials. The Cochrane review on CoQ10 for heart failure rates evidence as "low quality" overall — capping that outcome at B even with positive direction. Mitochondrial-cocktail trials where CoQ10 effect cannot be isolated were marked low-confidence. Each supplement is graded by health effect using a certainty × effect matrix applied across PubMed evidence per health effect. Cochrane reviews and high-quality systematic reviews carry the most weight. From abstract-only data, "high certainty" is rare — most A grades come from moderate certainty plus consistent meaningful-positive evidence. See Methodology for full detail.

Read the full methodology → · Download all 125 citations (PDF)