Every CoQ10 brand seems to argue the other form is wrong. Ubiquinol sellers call ubiquinone outdated. Ubiquinone sellers call ubiquinol unstable and overpriced. The honest answer sits between the two marketing claims, and it has more to do with what your body already does to CoQ10 than with which capsule you swallow.
CoQ10 exists in two interconvertible forms: ubiquinone (oxidized, the classic form used in most published research) and ubiquinol (reduced, marketed since the mid-2000s as better absorbed). The evidence on absorption is genuinely mixed: one well-controlled trial found ubiquinol raised blood levels further than ubiquinone, another found no statistically significant difference in adults over 65, and a third factor entirely, the formulation, outperformed both forms in that same study. Once absorbed, CoQ10 circulates in the blood mostly as ubiquinol regardless of which form was swallowed, because the body constantly interconverts the two as part of its normal antioxidant cycling. Ubiquinone remains the more stable, more extensively studied, and more affordable form, which is why AURÔ uses it.
What CoQ10 actually does
Coenzyme Q10 sits inside the inner mitochondrial membrane, where it acts as an electron carrier in the chain of reactions that converts food into usable cellular energy (ATP). Every cell in the body relies on this pathway, but it matters most in tissues with high energy demand: the heart, skeletal muscle, and the tissues most affected by aging.
The body makes its own CoQ10, but production declines from the twenties onward, and diet contributes very little; CoQ10-rich foods like organ meats and oily fish supply only a few milligrams per serving, far below supplemental doses. Statin medications add a second layer to this decline: statins block an enzyme pathway (HMG-CoA reductase) that produces both cholesterol and CoQ10, so lowering cholesterol with a statin also lowers circulating CoQ10, by roughly 16 to 54 percent depending on the study and the statin.
Ubiquinone vs ubiquinol: what's the actual difference
Ubiquinone is the oxidized form of CoQ10: it's more chemically stable, it was the form used in essentially all the foundational cardiovascular and statin research going back decades, and it's produced by fermentation rather than a separate synthesis step. Ubiquinol is the reduced form, meaning it carries two extra electrons. In theory, since more circulating CoQ10 exists as ubiquinol than ubiquinone in healthy blood, supplying it directly should skip a conversion step and absorb better.
The problem with that theory is that it treats absorption as the only variable. It isn't. Ubiquinol is also chemically less stable and prone to oxidizing back into ubiquinone during digestion, which is exactly the conversion it was supposed to skip. And both forms are fat-soluble, so how the capsule itself is formulated (dry powder versus oil suspension versus more novel delivery systems) tends to swing plasma results as much as, or more than, which redox form is inside it.
Three findings worth knowing
| Study | Design | What it found |
|---|---|---|
| Comparison study, Clinical Pharmacology in Drug Development, 2014 | 12 healthy adults, 200 mg/day for 4 weeks, crossover with washout | Ubiquinol raised steady-state plasma CoQ10 further (0.9 to 4.3 µg/mL) than ubiquinone (0.9 to 2.5 µg/mL); both increases were significant, and ubiquinol's advantage was statistically significant too |
| Pravst et al., Nutrients, 2020 | 21 adults aged 65–74, single 100 mg dose, three-way crossover | Ubiquinol was not significantly more bioavailable than ubiquinone (1.7-fold higher, p = 0.129); a water-soluble ubiquinone formulation outperformed both forms (2.4-fold higher, p = 0.002) |
| Same study, redox analysis | Measuring the chemical form CoQ10 actually took once absorbed | CoQ10 appeared in the blood mostly as ubiquinol regardless of which form was swallowed, showing the body converts between forms after absorption |
Put together, these findings say the ubiquinol-absorbs-better claim is real in some studies and absent in others, and that it disappears entirely once you ask what form is actually circulating in the blood rather than what form was in the capsule. That's a meaningfully different, and more honest, picture than either side's marketing copy.
Why we chose the simpler form
We formulate with ubiquinone for three reasons, in order of how much they actually matter. First, the evidence base: ubiquinone is the form behind nearly all the long-running cardiovascular and statin-depletion research, so when a study says "CoQ10 does X," it's very often ubiquinone specifically that was tested. Second, stability: ubiquinone is the more stable form over a product's shelf life, without the oxidation risk that comes with shipping and storing a reduced compound. Third, dose economics: ubiquinone lets us put a full 200 mg in a single capsule, well above the 30 to 100 mg that's typical on the shelf, rather than spending the formulation budget on the redox form.
AURÔ CoQ10 is a vegetable capsule (ubiquinone and rice flour in a hypromellose shell), as listed on the label, not an oil-based softgel. As the research above notes, formulation can matter as much as the form, so we do not claim better absorption than other products.
Statins, age, and who benefits most
The clearest case for supplementing is statin use. Statins reliably lower circulating CoQ10, and low CoQ10 is one proposed mechanism behind statin-associated muscle symptoms (soreness, weakness, fatigue) that lead some people to stop taking an otherwise beneficial medication. Whether supplementing actually relieves those symptoms is less settled: a 2025 systematic review pooling seven randomized trials (389 patients, 100 to 600 mg/day for 30 to 90 days) found a significant reduction in muscle symptoms in four of the seven trials and no significant change in the other three. That's a real but inconsistent effect, not a guarantee, and it's worth discussing with the prescribing doctor rather than treating as a fix.
Age is the second clear rationale: endogenous CoQ10 synthesis declines through adulthood, which is why nearly every bioavailability trial on this ingredient is run in older adults rather than in their twenties. Beyond statins and age, the case for supplementing gets thinner; CoQ10 is not a stimulant, has no acute effect, and the honest framing is mechanistic and long-term rather than something you'll feel this week.
One caution worth taking seriously: CoQ10 has a structural resemblance to vitamin K and may interact with blood-thinning medications like warfarin. If you take an anticoagulant or blood pressure medication, talk to your doctor before adding CoQ10, rather than treating this article as clearance to do so.
How to take it so it actually works
Whichever form you choose, three practical details matter more than the ubiquinone-versus-ubiquinol question. Follow the directions on your label: AURÔ CoQ10 is one capsule once a day, 20 to 30 minutes before a meal with a glass of water. CoQ10 is fat-soluble and some research suggests absorption is better with a fat-containing meal, so ask your healthcare professional which approach suits you. Take it in the morning or midday rather than at night, since some people find CoQ10 mildly energizing, though this is anecdotal rather than established in trials. And judge it over four to twelve weeks rather than days; plasma CoQ10 builds gradually with consistent daily dosing, which is exactly what the bioavailability trials above measured. The batch document for this product is on its product page, and our science page explains what it does and does not show.
If you already take NMN for cellular energy support, CoQ10 targets a complementary part of the same mitochondrial pathway rather than duplicating it, which is why we bundle the two together. And if you're generally deciding between competing forms of an ingredient, the same formulation-over-marketing logic applies to magnesium glycinate versus citrate.
Support your cellular energy
200 mg ubiquinone per capsule · Vegetable capsule · 30 capsules.
Everything you want to know
Is ubiquinol really better absorbed than ubiquinone?
Sometimes, in some studies. A 2014 crossover trial in healthy adults found ubiquinol raised steady-state plasma CoQ10 further than ubiquinone over 4 weeks. A 2020 trial in adults over 65 found no statistically significant difference between the two forms in a single dose. The honest summary is that the advantage is real in some conditions and absent in others, not a settled fact either way.
Why does AURÔ use ubiquinone instead of ubiquinol?
Ubiquinone is more stable in storage, backed by a larger and older body of research (including nearly all the statin-depletion literature), and lets us formulate at a full 200 mg dose. We think that combination outweighs the inconsistent absorption edge some studies find for ubiquinol.
I take a statin. Should I take CoQ10?
Statins measurably lower circulating CoQ10, and some (not all) clinical trials find that supplementing reduces statin-associated muscle symptoms. The evidence is real but mixed, so this is a conversation to have with the doctor managing your statin, not a decision to make from a blog post.
Do I need to take CoQ10 with food?
The AURÔ label directs one capsule 20 to 30 minutes before a meal with a glass of water. CoQ10, in either form, is fat-soluble, and some research suggests absorption is better with a fat-containing meal, so ask your healthcare professional which approach suits you.
How long before I notice a difference?
CoQ10 is not a stimulant and has no immediate, felt effect. Plasma levels build gradually with daily use; judge it over 4 to 12 weeks, the timeframe used in the bioavailability trials, rather than days.
Can I take CoQ10 with blood thinners like warfarin?
CoQ10 has a structural resemblance to vitamin K and may interact with anticoagulant medications. If you take warfarin, another blood thinner, or blood pressure medication, talk to your doctor before starting CoQ10.
This article is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Dietary supplements are not a substitute for a varied diet or medical advice. Consult a healthcare professional before starting any new supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition.
