Ubiquinol vs ubiquinone: which form of CoQ10 is best?

CoQ10 comes in two forms — ubiquinol (the reduced form) and ubiquinone (the oxidized form) — and the experts who take a side both land on ubiquinol. What's worth being precise about is *why* they land there, because it isn't the absorption argument you'll see on most supplement pages.

Hyman recommends ubiquinol specifically, at 100-200mg per day for energy and longevity. His strongest point is about statins: statins work by blocking HMG-CoA reductase in the mevalonate pathway, and that same pathway produces CoQ10 — so statin users are depleting their own CoQ10 and benefit from replacing it. Patrick makes the same statin argument independently, recommending ubiquinol to protect mitochondrial function in people on statin therapy, and citing ubiquinol for mitochondrial support more broadly.

Here's the honest nuance. The common claim that "ubiquinol is more bioavailable than ubiquinone" or that "older adults convert ubiquinone to ubiquinol less efficiently" is *not* something the experts say in our corpus — they simply recommend the ubiquinol form without making the head-to-head absorption comparison. So the grounded takeaway is narrower but reliable: if you want the form the experts actually recommend, it's ubiquinol, and the clearest case for it is if you take a statin.

Huberman recommends CoQ10 for fertility (egg and sperm quality) but doesn't specify a form, and Attia and Johnson don't weigh in on the ubiquinol-vs-ubiquinone question at all.