Side Effects of CoQ10

CoQ10 is a potent coenzyme that our bodies need for cells to function. Well it’s true that we make it naturally, production declines drastically as we age, which is why so many people are using CoQ10 supplements. But what are the side effects of CoQ10 supplements?

Reportedly most users experience no side effects of CoQ10 usage, and for those that do, they are often reported at very high doses and are mild and tolerable. Some of these side effects include digestive issues (such as upset stomach, heartburn, etc), dizziness, and others. You should speak to your doctor to learn about the side effects of CoQ10.

The consensus seems to be that the benefits of CoQ10 supplements far outweigh mild side effects.

Mild to moderate side effects of CoQ10
Reportedly loss of appetite, throat irritation, nausea, vomiting, diarrhea, and heartburn are some of the side effects which have been associated with CoQ10 supplements.

Reportedly some of these were associated with very high doses, which is something to keep in mind if you think you may be more susceptible to digestive issues. Personally speaking, I have never heard of anyone experiencing these side effects. But everyone is different so if for some reason you were to experience any of these, you should discontinue use and consult your doctor.

Serious side effects of CoQ10
There appears to be few claims of serious known CoQ10 side effects, but there reportedly are some known or theoretical side effects that could occur.

During the early days of staying CoQ10 it was theorized that it may cause high liver enzymes. Studies since then have not validated this claim but it is still something to consider.

If a person were to experience unexplained symptoms like wheezing, hives, rash, and other allergic reactions, they should definite be addressed by a doctor.

There have been at least four reported cases where CoQ10 was thought to decrease the effectiveness of blood thinners. Therefore if you are on these types of medication (or any medication for that matter) you should definitely consult a doctor before using CoQ10 supplements.

If a user were to experience fainting or possible dizziness, these side effects could be a sign of low blood pressure and a doctor should investigate this immediately.

Of course as with any dietary supplement (or anything for that matter) there may be side effects which are not known at this time.

Benefits vs. Side Effects?
Reportedly CoQ10 appears to be generally safe when used as directed. The side effects of CoQ10 are not common. Considering that the body’s natural production of CoQ10 peaks in the early twenties and declines drastically after that, you should ask your doctor if taking CoQ10 supplements would be right for you.

Coincidentally, we start experiencing the unpleasant signs of aging after our early twenties, which is also around the time our body’s natural production of CoQ10 decelerates. Are the two events related? No one knows for sure, but what we do know is that CoQ10 is found in every cell of the body. It is needed for the basic functioning of cells and also has potent antioxidant properties.

Warning: Many Coenzyme Q10 supplements use an older formulation which is shown to not be absorbed very well by your body. There are new formulations of CoQ10 supplements which have been developed which are said to offer much better CoQ10 absorption.