CoQ10 is a molecule your mitochondria (the power plants inside your cells) use to make energy, and your body makes its own. The groups with a real reason to consider it are people with heart failure, where one large trial found fewer serious heart problems, people on statins with muscle aches, where results are mixed, and people with rare genetic CoQ10 deficiency. For healthy people looking for more energy, there's no good evidence it helps.
- SymptomLow energy, or muscle aches on statins
- Before thatMitochondria produce energy less efficiently
- Before thatLess CoQ10 available in the energy assembly line
- RootStatins and some diseases lower the body's own CoQ10
What CoQ10 actually does
Coenzyme Q10, or CoQ10, sits inside your mitochondria and works as a link in the energy assembly line, called the electron transport chain, that recharges ATP, the molecule every cell uses for energy. Think of it as a conveyor belt that hands energy from one machine to the next. It also works as an antioxidant, a compound that neutralizes free radicals (unstable molecules that damage what they touch).
Here's the key detail: your body makes its own CoQ10. You also get small amounts from meat, fish and nuts. So the question isn't "do I need CoQ10?" (you do), it's "am I short of it, and would a supplement fix that?"
Who might be short: people on statins
Statins are common cholesterol-lowering drugs. They work by blocking a production pathway in the liver that makes cholesterol. The same pathway also makes CoQ10. So it's no surprise that a meta-analysis (a study pooling the results of many studies) of 12 trials found that statins lower CoQ10 levels in the blood.[1]
Some people on statins get muscle aches. Could topping up CoQ10 help? Here the evidence splits:
- A 2018 meta-analysis of 12 trials with 575 patients found CoQ10 reduced statin-related muscle symptoms.[2]
- An earlier 2015 meta-analysis of 6 trials with 302 patients found no significant benefit.[3]
Our read: a reasonable thing to discuss with your doctor if you have aches, cheap and low-risk for most people, but not a sure fix. Don't stop a statin on your own; for many people it's protecting the heart.
The strongest case: heart failure
Heart failure means the heart muscle can't pump as well as it should. Heart muscle is one of the most energy-hungry tissues in the body. In the Q-SYMBIO trial, 420 people with chronic heart failure took CoQ10 or a placebo (a dummy pill) on top of their usual treatment for two years. The CoQ10 group had significantly fewer major heart events, and fewer died from heart causes, 9 percent versus 16 percent.[4]
That's a striking result, but it's one trial, partly supported by CoQ10 manufacturers, and it hasn't been replicated at the same scale. Some cardiologists use CoQ10 as an add-on; it's not standard everywhere. If you have heart failure, this is a conversation for your cardiologist, not a self-experiment.
Everyone over 40 should take CoQ10 for energy and heart health.
The evidence points to specific groups: heart failure, possibly statin users with aches, and rare genetic deficiencies. For healthy people, there's no good evidence of more energy.
Who should consider it, at a glance
Heart failure, as an add-on
A · One large trialFewer major heart events in Q-SYMBIO. Discuss with your cardiologist.
Statin users with muscle aches
A · Mixed trialsSome meta-analyses show benefit, others don't. Low risk to try with your doctor's OK.
Primary CoQ10 deficiency
A · Medical treatmentA rare genetic condition where the body can't make enough CoQ10. Here supplementation is part of medical care.
Healthy people wanting more energy
No good evidenceYour body makes enough. For energy, training, sleep and fixing deficiencies work far better.
The bottom line
CoQ10 is essential, but you already make it. A supplement makes sense when something is draining your supply or your heart needs extra support: heart failure, possibly statins, and rare genetic conditions. For everyone else, it's an expensive way to top up a tank that isn't empty. If you do try it, check interactions first, especially with blood thinners.
Frequently asked questions
Do statins deplete CoQ10?
Yes. Statins lower cholesterol by blocking a production pathway that the body also uses to make CoQ10, and a meta-analysis of 12 trials found statins reduce CoQ10 levels in the blood. Whether that causes symptoms, and whether supplements fix them, is less clear.
Should I take CoQ10 with my statin?
It's reasonable to ask your doctor, especially if you have muscle aches. Studies disagree on whether it helps. Never stop or change a statin without talking to your doctor.
Ubiquinol or ubiquinone, which is better?
They're two forms of the same molecule, and your body converts between them. Both raise blood levels. Ubiquinol is often marketed as better absorbed, but there's no strong evidence it gives better health results.
Does CoQ10 interact with medications?
It may reduce the effect of the blood thinner warfarin and could affect blood pressure or blood sugar medicines. Check with your doctor or pharmacist before starting it.
Sources
- Qu H, et al. The effect of statin treatment on circulating coenzyme Q10 concentrations: an updated meta-analysis of randomized controlled trials. European Journal of Medical Research, 2018.
- Qu H, et al. Effects of coenzyme Q10 on statin-induced myopathy: an updated meta-analysis of randomized controlled trials. Journal of the American Heart Association, 2018.
- Banach M, et al. Effects of coenzyme Q10 on statin-induced myopathy: a meta-analysis of randomized controlled trials. Mayo Clinic Proceedings, 2015.
- Mortensen SA, et al. The effect of coenzyme Q10 on morbidity and mortality in chronic heart failure: results from Q-SYMBIO. JACC: Heart Failure, 2014.