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Ubiquinol vs. Ubiquinone: Two Forms of CoQ10 — Does the Difference Actually Matter?

September 15, 2026 · Shopify API

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Coenzyme Q10 (CoQ10) supplements come in two forms: ubiquinone, the oxidised form, and ubiquinol, the reduced form. Your body uses both, switching CoQ10 between them as it passes electrons along in the mitochondria. Marketing often presents ubiquinol as dramatically superior. Here is what the published studies actually show about absorption, outcomes and the redox question, including where the evidence favours ubiquinol.

This article is for general education and is not medical advice. Talk to your doctor before starting CoQ10, especially if you take a blood thinner, a statin, blood-pressure medication or any other prescription drug.

Why CoQ10 matters, and why levels change with age

CoQ10 is a carrier in the mitochondrial electron transport chain, the step at which cells make ATP, and also acts as an antioxidant in cell membranes. Kalén and colleagues measured CoQ10 (ubiquinone) in human organs from donors aged one day to 81 years and found that in most organs it peaked around age 20 and then decreased with further ageing.[1]

Absorption: the evidence leans towards ubiquinol, and formulation matters a lot

CoQ10 is a large, fat-soluble molecule, and its absorption from the gut is slow and limited; Bhagavan and Chopra's review notes that solubilised formulations show better bioavailability.[2]

  • Langsjoen and Langsjoen (2014): in 12 healthy volunteers, four weeks of 200 mg a day of ubiquinol raised plasma CoQ10 more than four weeks of 200 mg a day of ubiquinone with identical soft-gel excipients.[3]
  • López-Lluch and colleagues (2019): comparing seven different formulations in 14 young adults, bioavailability varied widely; the two best-absorbed were soft-gels containing ubiquinone or ubiquinol, and the carrier matrix and additives made a significant difference. Individuals also varied in how much their blood levels rose.[4]

So form matters, but so does the formulation, and so does taking it with food that contains fat, since CoQ10 dissolves in fat rather than water.

Outcomes: what a recent ubiquinol trial found

Acton and colleagues randomised 54 healthy, recreationally active men to 300 mg a day of ubiquinol or placebo for six weeks. Ubiquinol raised plasma CoQ10 and improved a measure of how efficiently mitochondria coupled oxygen use to energy production, but it did not change exercise capacity (time to exhaustion) or oxygen-uptake kinetics during hard cycling.[5] The authors also note that most earlier studies used ubiquinone and found no effect on mitochondrial function or endurance performance.

Head-to-head trials comparing the two forms on the same clinical outcome remain scarce, so it is not established that ubiquinol produces better health outcomes than ubiquinone, only that it can raise blood levels more in the studies above.

The redox question

In 1,333 adults from the general population in northern Germany followed for about 13 years, Stürmer and colleagues found that a higher CoQ10 redox state, defined as a higher percentage of the oxidised form (ubiquinone) in total CoQ10 in the blood, was independently associated with a higher risk of death from any cause.[6] This is an observational finding about the body's own CoQ10 balance, not a trial of supplements, so it does not show that taking either form changes mortality risk.

If you take a statin

Statins lower plasma CoQ10: a meta-analysis of placebo-controlled trials by Banach and colleagues found a significant reduction across the statins studied.[7] Whether CoQ10 helps statin-related muscle symptoms is disputed: Qu and colleagues' meta-analysis found improvements in muscle pain, weakness, cramps and tiredness,[8] while a meta-analysis by Wei and colleagues found no significant benefit.[9] Never stop or change a statin without your doctor.

Practical takeaways

  • Take CoQ10 with a meal that contains fat.
  • If you want the highest blood levels per milligram, the small studies above favour ubiquinol or a well-formulated soft-gel.
  • Ubiquinone remains a reasonable, widely studied choice, especially taken with food.
  • Check with your doctor if you take a blood thinner or other prescription medication.

Where The Vital Co. fits

Vital CoQ10 Ubiquinone provides 200 mg of CoQ10 as ubiquinone in a vegetable capsule (not an oil soft-gel), one a day with a meal containing fat. We do not sell ubiquinol, and we would rather you choose with the evidence above in mind. Vital CoQ10 Ubiquinone is also part of the Longevity & Cellular Stack, alongside Vital NAD+ and Vital NMN.

References

  1. Kalén A, Appelkvist EL, Dallner G. Age-related changes in the lipid compositions of rat and human tissues. Lipids. 1989. DOI: 10.1007/BF02535072 (PMID 2779364)
  2. Bhagavan HN, Chopra RK. Coenzyme Q10: absorption, tissue uptake, metabolism and pharmacokinetics. Free Radical Research. 2006. DOI: 10.1080/10715760600617843 (PMID 16551570)
  3. Langsjoen PH, Langsjoen AM. Comparison study of plasma coenzyme Q10 levels in healthy subjects supplemented with ubiquinol versus ubiquinone. Clinical Pharmacology in Drug Development. 2014. DOI: 10.1002/cpdd.73 (PMID 27128225)
  4. López-Lluch G, et al. Bioavailability of coenzyme Q10 supplements depends on carrier lipids and solubilization. Nutrition. 2019. DOI: 10.1016/j.nut.2018.05.020 (PMID 30153575)
  5. Acton JP, et al. Effect of six weeks ubiquinol supplementation on mitochondrial respiratory function and exercise capacity in healthy males. European Journal of Applied Physiology. 2026. DOI: 10.1007/s00421-026-06275-w (PMID 42249931)
  6. Stürmer P, et al. Higher Redox State of Coenzyme Q10 Is Associated with Higher Risk of All-Cause Mortality in a Sample from the Northern German General Population. Antioxidants. 2026. DOI: 10.3390/antiox15030343 (PMID 41897489)
  7. Banach M, et al. Statin therapy and plasma coenzyme Q10 concentrations: A systematic review and meta-analysis of placebo-controlled trials. Pharmacological Research. 2015. DOI: 10.1016/j.phrs.2015.07.008 (PMID 26192349)
  8. Qu H, et al. Effects of Coenzyme Q10 on Statin-Induced Myopathy: An Updated Meta-Analysis of Randomized Controlled Trials. Journal of the American Heart Association. 2018. DOI: 10.1161/JAHA.118.009835 (PMID 30371340)
  9. Wei H, et al. Effects of coenzyme Q10 supplementation on statin-induced myopathy: a meta-analysis of randomized controlled trials. Irish Journal of Medical Science. 2022. DOI: 10.1007/s11845-021-02651-x (PMID 33999383)

About The Vital Co.

Three pillars — gut, inflammation and longevity — and a simple rule behind every formula: we start with published human research, print our amount next to the amount the studies actually used, and say so plainly when ours is the smaller number. If we wouldn't take it ourselves, it doesn't go on the site.

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† These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement.

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