Ubiquinol vs Ubiquinone: Which Form of CoQ10 Should You Take?

2026. augusztus 31.

Ubiquinol and ubiquinone differ by two letters, and if you blink at the label you will miss it. Both are active forms of coenzyme Q10, the compound your cells use to turn food into energy and to protect their membranes from damage. Your body converts one into the other constantly, which makes the choice between the two bottles less obvious than it looks.

What Is the Difference Between Ubiquinol and Ubiquinone?

Coenzyme Q10 is the molecule. Ubiquinone and ubiquinol are the two states it moves between, and each does a different job:

Ubiquinone carries electrons through the reactions that make your cells' energy.

Ubiquinol works as an antioxidant, protecting fats in your blood and cell membranes (1).

Inside your mitochondria, the tiny power plants in almost every cell, ubiquinone picks up electrons and becomes ubiquinol, then passes them on and turns back.

So why is one still sold as CoQ10? Ubiquinone was the only form on the market for decades and kept the parent name. Ubiquinol is less stable and harder to formulate, so it arrived later and is always named on the front. A supplement labelled only CoQ10 is almost always ubiquinone.

Whichever you take, most of what circulates is ubiquinol. In one crossover trial, around 90% of the CoQ10 in the blood was ubiquinol after either form (2). Laboratory and dog studies suggest ubiquinol is oxidised back to ubiquinone before it crosses the gut wall, though this has not been shown in people (3).

Which Form Is Better Absorbed?

Three small crossover trials have given the same people both forms and measured what reached the blood. Two found more got there with the ubiquinol product tested.

Ten older men took 200 mg a day of each for two weeks: ubiquinol clearly raised their levels, while the rise with ubiquinone was too small to separate from chance (4). Twelve adults took a single 240 mg dose of each, and a newer cocrystal ubiquinol delivered about twice as much (5).

The third disagrees. In 21 older adults, ubiquinol produced 70% more than a standard ubiquinone capsule, but results varied so widely that the difference could have been chance (2).

All three trials were small, and each tested products rather than the molecules alone.

Why Formulation Can Matter More Than Form

CoQ10 is one of the most water-repelling molecules your body makes, and only around 5% or less of an oral dose reaches the blood (3, 6).

How a supplement is made can change that more than which form it contains.

When several products were tested in the same people, the best was a ubiquinone whose crystals had been reshaped so they dissolve at body temperature. The identical material, untreated, absorbed 75% less. A ubiquinol sat between the two, beating the untreated version but not the treated one (7).

In the older-adult trial above, a water-soluble ubiquinone syrup delivered 2.4 times as much into the blood as a standard capsule (2).

Liposomal versions wrap CoQ10 in tiny fat bubbles to survive digestion, though how well that works depends on the formulation (8).

Which Form Has the Better Evidence?

CoQ10 has been studied for fatigue, for heart failure, and for the muscle aches that can come with statins, and the body's own production falls with age (2, 9, 10).

There is more long-term research on ubiquinone, the original form. In a two-year trial, 420 people with chronic heart failure took 100 mg of a crystal-modified ubiquinone three times a day and had fewer heart-related deaths and hospital admissions than those given placebo (3, 11, 12). A review comparing the two forms found reductions in death rates reported only in ubiquinone trials, with no ubiquinol trial yet showing the same over a comparable period (13).

Ubiquinol's evidence comes from shorter studies, such as an eight-week trial where 100 or 200 mg a day improved blood vessel flexibility in people with high cholesterol (14).

For fatigue and statin muscle aches, studies have used both forms, and there is not enough head-to-head evidence to say either works better.

Which Should You Take?

Whichever you choose, your body converts it, and most of what ends up in your blood is ubiquinol.

Ubiquinol is the more reliable default if you would rather not judge formulations. A ubiquinone made to dissolve properly can get just as much CoQ10 into your blood as ubiquinol or more.

What matters more is the dose, how the product is made, and taking it every day with a meal containing fat. Ubiquinone trials have mostly used 60 to 300 mg a day and ubiquinol trials 300 to 600 mg (13).

At Augment Life, Ubiquinol Coenzyme Q10 provides 200 mg of ubiquinol per capsule. Coenzyme Q10 provides 200 mg of ubiquinone, and Liposomal Coenzyme Q10 provides 250 mg of CoQ10 in a sunflower lecithin carrier.

References

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Pravst I, Rodríguez Aguilera JC, Cortes Rodriguez AB, Jazbar J, Locatelli I, Hristov H, et al. Comparative Bioavailability of Different Coenzyme Q10 Formulations in Healthy Elderly Individuals. Nutrients. 2020;12(3):784. https://doi.org/10.3390/nu12030784
Mantle D, López-Lluch G, Hargreaves IP. Coenzyme Q10 Metabolism: A Review of Unresolved Issues. International Journal of Molecular Sciences. 2023;24(3):2585. https://doi.org/10.3390/ijms24032585
Zhang Y, Liu J, Chen XQ, Chen CO. Ubiquinol is superior to ubiquinone to enhance Coenzyme Q10 status in older men. Food & Function. 2018;9:5653-5659. https://doi.org/10.1039/c8fo00971f
Mei X, Zhu B, Soni K, Kasaraneni K, Panchal N. A Randomized, Double-Blind, Two-Treatment, Two-Period, Crossover Study Investigating the Systemic Bioavailability of a Novel Cocrystal Ubiquinol Formulation Compared with a Ubiquinone Formulation in Healthy Adults. Clinical Pharmacology in Drug Development. 2026;15(3):e70042. https://doi.org/10.1002/cpdd.70042
Hernández-Camacho JD, Bernier M, López-Lluch G, Navas P. Coenzyme Q10 Supplementation in Aging and Disease. Frontiers in Physiology. 2018;9:44. https://doi.org/10.3389/fphys.2018.00044
López-Lluch G, Del Pozo-Cruz J, Sánchez-Cuesta A, Cortés-Rodríguez AB, Navas P. Bioavailability of coenzyme Q10 supplements depends on carrier lipids and solubilization. Nutrition. 2019;57:133-140. https://doi.org/10.1016/j.nut.2018.05.020
Amalraj A, Abraham EK, Jogy AM, Gopi S. Next-generation liposomal coenzyme Q10: from formulation to clinical evidence via metazome technology for improved stability and enhanced oral absorption. Food & Function. 2026. https://doi.org/10.1039/d5fo05217c
Tsai IC, Hsu CW, Chang CH, Tseng PT, Chang KV. Effectiveness of Coenzyme Q10 Supplementation for Reducing Fatigue: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Frontiers in Pharmacology. 2022;13:883251. https://doi.org/10.3389/fphar.2022.883251
Ahmad K, Manongi NJ, Rajapandian R, Moti Wala S, Al Edani EM, Samuel EA, et al. Effectiveness of Coenzyme Q10 Supplementation in Statin-Induced Myopathy: A Systematic Review. Cureus. 2024;16(8):e68316. https://doi.org/10.7759/cureus.68316
Mortensen SA, Rosenfeldt F, Kumar A, Dolliner P, Filipiak KJ, Pella D, et al. The effect of coenzyme Q10 on morbidity and mortality in chronic heart failure: results from Q-SYMBIO: a randomized double-blind trial. JACC: Heart Failure. 2014;2(6):641-649. https://doi.org/10.1016/j.jchf.2014.06.008
Mortensen AL, Rosenfeldt F, Filipiak KJ. Effect of coenzyme Q10 in Europeans with chronic heart failure: A sub-group analysis of the Q-SYMBIO randomized double-blind trial. Cardiology Journal. 2019;26(2):147-156. https://doi.org/10.5603/cj.a2019.0022
Fladerer JP, Grollitsch S. Comparison of Coenzyme Q10 (Ubiquinone) and Reduced Coenzyme Q10 (Ubiquinol) as Supplement to Prevent Cardiovascular Disease and Reduce Cardiovascular Mortality. Current Cardiology Reports. 2023;25:1759-1767. https://doi.org/10.1007/s11886-023-01992-6
Sabbatinelli J, Orlando P, Galeazzi R, Silvestri S, Cirilli I, Marcheggiani F, et al. Ubiquinol Ameliorates Endothelial Dysfunction in Subjects with Mild-to-Moderate Dyslipidemia: A Randomized Clinical Trial. Nutrients. 2020;12(4):1098. https://doi.org/10.3390/nu12041098