Coenzyme Q10 for Heart Failure
Verdict: Published with Warning
Across 6 PubMed studies, the evidence for Coenzyme Q10 in Heart Failure grades Tier B — preliminary evidence. Effective, but with safety or population caveats.
B 🟡 B Preliminary Evidence Published with Warning
Why this grade7-layer evidence engine
⚖️
Scoring transparency
All scores computed by a 7-layer evidence engine — fully auditableRaw score 0.61
D
C
B
A
S
← counter-evidence / ineffectiveeffective / strong evidence →
Final grade
B · Published with Warning
Confidence
83%
Highly consistent evidence
Evidence level
E1
Cochrane high-quality SR/MA
▸View the full decision path (audit trail)
- compute_raw_score — 加權公式: L2×0.30 + L3×0.25 + L5×0.25 + L11×0.10 + L1×0.10 = 0.607
- tier_from_score — 依分數區間映射至 tier letter
- apply_hec_rules — 高品質 SR/MA 顯示 positive (4 篇 > 0 negative)
- tier_strict_requirement_check — Tier 條件達標，未降階
- detect_disputes — 偵測到 0 個 hard + 0 個 soft dispute
- decide_status — 依 tier + dispute 結果決定 status
PubMed studies (6)L2 · primary research & systematic reviews
Coenzyme Q10 for heart failure
Finding: CoQ10 probably reduces all-cause mortality (RR 0.58, 95% CI 0.35-0.95, moderate-quality) and HF hospitalisation (RR 0.62, 95% CI 0.49-0.78, moderate-quality), but LVEF improvement is inconclusive (MD 1.77, 95% CI 0.09-3.44, very-low-quality) and authors conclude there is no convincing evidence to support or refute use.
View on PubMed The effect of coenzyme Q10 on morbidity and mortality in chronic heart failure: results from Q-SYMBIO: a randomized double-blind trial
Finding: In the Q-SYMBIO multicentre double-blind RCT, CoQ10 100 mg three times daily halved 2-year MACE (15% vs 26%; HR 0.50, 95% CI 0.32-0.80, p=0.003) and reduced all-cause mortality (10% vs 18%, p=0.018).
View on PubMed Efficacy and safety of coenzyme Q10 in heart failure: a meta-analysis of randomized controlled trials
Finding: Pooling 33 RCTs, CoQ10 reduced all-cause mortality (RR 0.64, 95% CI 0.48-0.85, p=0.002, GRADE moderate), HF hospitalisation (RR 0.50, 95% CI 0.37-0.67, p<0.00001) and improved LVEF (MD 0.51), NYHA class, BNP and 6-minute walk distance without major adverse effects.
View on PubMed Effect of coenzyme Q10 on cardiac function and survival in heart failure: an overview of systematic reviews and meta-analyses
Finding: Umbrella review of 10 meta-analyses found CoQ10 reduced mortality (RR range 0.69 [0.50-0.95] to 0.58 [0.35-0.95]) and hospitalisation (RR 0.62, 95% CI 0.49-0.78) and improved LVEF in 6 of 9 studies (+1.77% to +3.81%), but did NOT improve exercise capacity.
View on PubMed Evaluating the efficacy of ubiquinol in heart failure patients: a systematic review and meta-analysis
Finding: Across 16 studies, ubiquinol/CoQ10 reduced HF-related mortality by 40% and improved exercise capacity, but showed NO significant difference in LVEF; the abstract reports no 95% CI or p-value for the headline mortality figure.
View on PubMed Coenzyme Q10 in the treatment of heart failure: A systematic review of systematic reviews
Finding: Overview of 7 systematic reviews (covering ~71 RCTs, ~4,688 participants) concluded there is a case for CoQ10 as ADJUNCTIVE therapy in congestive heart failure, especially for patients unable to tolerate mainstream therapy; no pooled effect size is given in the abstract.
View on PubMed Regulatory & authoritative positionsL4/L5 · FDA / EMA / NIH ODS / Cochrane / Mayo …
L4a US FDA
Cautious
not generally recognized as safe and effective for the referenced uses and therefore are considered "new drugs" source↗
L4b EU EFSA
Against
a cause and effect relationship has not been established between the consumption of coenzyme Q10 and the claimed effects source↗
L4c UK NHS
Cautious
Advise people with migraine that the food supplement riboflavin (400 mg once a day) may be effective in reducing migraine frequency and intensity for some people. source↗
L4d TW TFDA / 衛福部
Cautious
訂定「食品原料輔酵素Q10 (Coenzyme Q10)之使用限制及標示規定」 source↗
L5b Mayo Clinic
Cautious
CoQ10 may improve congestive heart failure symptoms. Additionally, although findings are mixed, CoQ10 might help lower blood pressure. Some research also suggests that when taken with other nutrients, CoQ10 might help people recover from bypass and heart valve surgeries. Most healthcare professionals think CoQ10 is safe, with few side effects, but ask your healthcare professional before you tak… source↗
L5c Cleveland Clinic
Cautious
CoQ10 may benefit people living with heart disease — particularly heart failure. CoQ10 supplementation is in addition to other treatments you're undergoing. It's meant to work with what you're already doing, not replace it. source↗
L5e Specialty Society (condition-mapped)
Against
The American College of Cardiology Foundation and the American Heart Association recommended against the use of nutritional supplements (including coenzyme Q10) for the treatment of heart failure. source↗