Rankings / Mitochondria & Cellular Energy
CoQ10 (ubiquinone/ubiquinol)
Mitochondria & Cellular Energy · Electron transport cofactor
Tier A+
What this is
Q-SYMBIO trial (Mortensen 2014, JACC HF): 3x100 mg ubiquinone x 2 yr in NYHA III-IV HF; 18% cardiovascular mortality reduction; ~42% reduction in MACE. European subgroup analysis 2019 confirmed effect direction. 2024 systematic review of 16 studies replicated 40% HF-related mortality reduction signal. Depleted by statins via shared mevalonate pathway — consider for statin-induced muscle symptoms (2025 MA supports modest pain reduction). Endogenous levels decline with age, hence the elderly absorption argument for ubiquinol. **Ubiquinol vs ubiquinone caveat**: ubiquinol delivers ~3-4x higher plasma CoQ10 in adults >40 (more pronounced in elderly) per multiple bioavailability RCTs, but the strongest clinical outcome trials (Q-SYMBIO) used ubiquinone at 300 mg/day. Translation: if you're young/healthy, either form works; if you're >50 or have malabsorption or are post-MI/HF, ubiquinol is the better-justified choice.
Mechanism
Electron transport chain cofactor (complex III; mitochondrial ATP synthesis); lipid-soluble antioxidant in membranes and LDL; endogenous synthesis shares the mevalonate pathway with cholesterol — depleted by statins; ubiquinol = reduced/active form; ubiquinone = oxidized form (interconverted in vivo by NQO1 and other reductases)
Dose & route
100-300 mg/day with fat-containing meal; ubiquinol form preferred for adults >50 (3-4x higher plasma CoQ10 in elderly due to reduced NQO1 conversion capacity); pivotal RCTs (Q-SYMBIO) used ubiquinone — bioavailability advantage of ubiquinol does NOT automatically translate to superior outcomes
Citations
- https://www.jacc.org/doi/10.1016/j.jchf.2014.06.008
- https://pubmed.ncbi.nlm.nih.gov/25282031/
- https://www.ahajournals.org/doi/pdf/10.1161/circheartfailure.115.002639
- https://pubmed.ncbi.nlm.nih.gov/39049769/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC12554813/
- https://pubmed.ncbi.nlm.nih.gov/22704112/
- https://pubmed.ncbi.nlm.nih.gov/35327404/
- https://doi.org/10.1038/s41419-026-08796-w
- https://pubmed.ncbi.nlm.nih.gov/37005430/
- https://pubmed.ncbi.nlm.nih.gov/30835327/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC6770205/
- https://pubmed.ncbi.nlm.nih.gov/41669146/
- https://pubmed.ncbi.nlm.nih.gov/41420182/
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This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.