Coenzyme Q10 (CoQ10) is one of the most popular supplements for adults over 40, especially for heart health and everyday energy.† Shop for it and you'll see two names: ubiquinone and ubiquinol. They're two forms of the same nutrient, and the difference is worth understanding.
What CoQ10 does
CoQ10 is a vitamin-like compound found in nearly every cell. It plays a central role in how mitochondria turn food into usable energy, and it acts as an antioxidant in cell membranes. Organs that work nonstop, like the heart, have some of the highest concentrations.
The two forms
- Ubiquinone is the oxidized form. It's the classic, widely available CoQ10 and is generally less expensive.
- Ubiquinol is the reduced, active-antioxidant form. It's the form that predominates in the bloodstream. Your body converts ubiquinone into ubiquinol as needed.
Why age changes the equation
Your body makes its own CoQ10, but production declines as you get older. Some research also suggests the conversion from ubiquinone to ubiquinol may become less efficient with age. That's why many people over 40 choose ubiquinol: it's already in the form the body circulates.
Certain cholesterol-lowering medications (statins) are also known to lower the body's CoQ10 levels. If you take one, ask your doctor whether CoQ10 makes sense for you.
Which one should you take?
| Ubiquinone | Ubiquinol | |
|---|---|---|
| Form | Oxidized | Reduced (active antioxidant) |
| Conversion needed | Yes | No |
| Often preferred by | Younger adults, budget buyers | Adults over 40 |
| Cost | Lower | Higher |
Both forms are fat-soluble, so take CoQ10 with a meal that contains some fat. Softgels made with oil are a good way to support absorption.
How much CoQ10?
Common supplement amounts range from 100 to 300 mg a day. Sculptiva Black Garlic provides 200 mg of CoQ10 as ubiquinol per two-softgel serving, alongside 1,000 mg of fermented black garlic extract and 100 mcg of vitamin K2 (MK-7).
Safety notes
CoQ10 is generally well tolerated. It may interact with blood thinners such as warfarin and with some blood-pressure medications, so check with your doctor first if you take any prescription medication, are pregnant or nursing, or have a medical condition.
Related: Black garlic benefits · Vitamin K2 MK-7 guide
†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for general education and isn't medical advice.