Ask the expert

Shape, July, 2008 by Victoria Maizes

Q I've heard so much about the benefits of coenzyme [Q.sub.10]. What is it, and is it worth taking?

A Coenzyme [Q.sub.10]-better known as Co[Q.sub.10]- is a vitamin-like substance your body produces naturally. Present in every cell, it's necessary for basic body functioning and also acts as an antioxidant. Healthy people typically make plenty of the nutrient on their own, but research has linked illnesses like heart and gum disease with lower levels of Co[Q.sub.10]. What's more, some prescription medications, such as cholesterol-lowering statins, can diminish levels even further.

If you have a chronic condition, consider speaking to your doctor about taking a [CoQ.sub.10] supplement: Preliminary studies suggest the nutrient (which is available at health food and vitamin stores) may lower blood pressure levels, heal gum disease and even slow the rate of deterioration from diseases such as Parkinson's. But if you're healthy, there isn't enough evidence to prove that taking [CoQ.sub.10] is beneficial.

Women's health expert Victoria Maizes, M.D., is the executive director of the University of Arizona Center for Integrative Medicine.