Krill oil and CoQ10 are two different supplements, and you do not need to take them together. The one honest reason to pair them is that CoQ10 is fat-soluble and absorbs better with fat, but we found no trial showing that a krill oil plus CoQ10 combination does anything the two taken separately do not. The reasons people reach for CoQ10 (statins, blood pressure, heart health) have weaker evidence than the marketing suggests.
Captains Krill Oil™ contains no added CoQ10, so we have nothing to sell you on this one. Here is what the evidence supports and what it does not.
What CoQ10 is, and what krill oil is
Krill oil is sold for its omega-3 fatty acids (EPA and DHA) carried in phospholipids. CoQ10 (coenzyme Q10) is a different molecule: a fat-soluble compound your body makes and uses in energy production. Nothing about one replaces the other. Some brands sell capsules that combine them, and combination patents and products exist, but a combination label is a marketing choice, not evidence of added benefit.
The one real reason to pair them: fat helps CoQ10 absorb
CoQ10 is fat-soluble, so it is usually taken with food or oil. A 2022 randomized, triple-blind crossover study in the Journal of Nutritional Science (PubMed 35291282) gave 30 healthy young adults a single 200 mg dose of CoQ10 as plain powder, with a monoglyceride omega-3 oil, or in rice oil. Blood exposure over 48 hours was about two times higher with the omega-3 oil or rice oil than with the powder alone. The authors concluded CoQ10 should be taken with lipids.
The limits are real. It was a single dose in 30 young people, it measured blood levels and not health outcomes, and it did not test krill oil. So the fair takeaway is narrow: if you take CoQ10, take it with a meal or some fat. It does not show that a krill oil capsule is the best fat to take it with.
What the evidence says about why people take CoQ10
The National Center for Complementary and Integrative Health (NCCIH fact page, last updated January 2019) is blunt on the common reasons:
- Statin muscle pain. “The overall scientific evidence does not support the idea that CoQ10 can reduce muscle pain caused by the cholesterol-lowering drugs known as statins.”
- Heart disease. Only a few studies have looked at prevention and the results are inconclusive; heart failure evidence is also described as inconclusive. NCCIH notes a possible benefit for some complications of heart surgery.
- Blood pressure. The small amount of evidence suggests CoQ10 probably does not have a meaningful effect.
- Safety. No serious side effects have been reported; mild ones such as insomnia or digestive upset may occur. It may interact with warfarin and insulin.
That page is several years old, and newer trials may have shifted parts of the picture, so ask your doctor about your own situation. But it is a useful anchor against the claim that CoQ10 is a proven heart or statin fix.
Krill oil is not a proven heart fix either
We say the same about our own product. The strongest case for omega-3 is as a way to cover an intake gap and, at higher doses, to lower triglycerides. We walk through the numbers in krill oil and triglycerides and the dosing range in how much krill oil per day. Stacking two supplements with modest evidence does not add up to strong evidence.
If you take blood thinners or insulin
Ask first. NCCIH flags warfarin and insulin as possible CoQ10 interactions. For the omega-3 side, the NIH Office of Dietary Supplements says doses of 3 to 6 g a day of fish oil did not significantly change anticoagulant status in people on warfarin, but recommends periodic INR monitoring. Our article on krill oil and blood thinners goes through it.
Where Captains fits
Captains is mechanically extracted on the boat with no chemical solvent, in small batches, and after 20 years in business we will still tell you it is a natural product. EPA and DHA vary a little from lot to lot, we test lots at random and they come back strong, and documentation is available on request. If you want CoQ10, it is a separate purchase and a separate decision. See Boat to Bottle for how ours is made.
You might not need us (or CoQ10)
If you eat oily fish like salmon or sardines a couple of times a week, you already cover your EPA and DHA without krill oil. If you are on a statin and have muscle pain, the evidence points to talking with your prescriber about dose or drug, not to adding CoQ10. And if a label offers both in one capsule at a premium, you can usually do better buying only what you need.
Frequently asked questions
Is CoQ10 in krill oil?
Not as a rule. CoQ10 is a separate compound, and krill oil is sold for its omega-3 phospholipids. Some products add CoQ10 to a krill oil capsule, so check the supplement facts panel rather than assuming.
Does krill oil help CoQ10 absorb better?
Plausibly, because CoQ10 is fat-soluble and absorbs better with fat. A 2022 crossover study of 30 people found roughly double the CoQ10 exposure when 200 mg was taken with an omega-3 oil or rice oil than as plain powder. That study did not test krill oil specifically, so treat it as support for taking CoQ10 with some fat, not proof about any one product.
Can CoQ10 and krill oil be taken at the same time?
Nothing we found says they cannot. Both are generally well tolerated, and taking them with a meal is a common way to do it. If you take warfarin or insulin, ask your doctor first, because NCCIH lists both as possible CoQ10 interactions and omega-3s are also watched with blood thinners.
Does CoQ10 stop statin muscle pain?
The evidence does not support it. NCCIH states that the overall scientific evidence does not support CoQ10 reducing muscle pain caused by statins. Talk to your prescriber about muscle symptoms rather than adding a supplement on a hunch.
Is a krill oil with CoQ10 better than taking them separately?
We found no trial that tests the combination against the two taken separately. Buying them separately lets you dose each to your own goal and skip the one you do not need.
Honest answer, not a pitch. — captainskrilloil.com