The Mayo Clinic says that people who suffer from heart disease often have lower levels of CoQ10. You can take dietary supplements, though, to increase your levels of this antioxidant.

DEAR MAYO CLINIC: Growing up, I was told to drink orange juice when I had a cold because "vitamin C is the cure." ... For most people, taking a daily oral supplement of vitamin C via tablets, ...

But if you want to pump up the vitamin C even more, you could try a daily supplement. “Most cases, it’s 500 milligrams of vitamin C. Too much of anything is not necessarily a good thing.

How these two vitamin supplements could do more harm than good. ... Kate Zeratsky, a registered dietitian nutritionist at Mayo Clinic in Rochester, Minnesota, agrees.

Likely benefits include increased bone health, immunity, mental heath and more, according to Mayo Clinic. Likely benefits include increased bone health, immunity, ...

Water-soluble vitamins are not stored in the body, and any excess B vitamins are excreted in the urine, Katherine Zeratsky, a registered dietitian at the Mayo Clinic, tells TODAY.com.

The Mayo Clinic recommends folic acid supplements for people with poor diets or conditions that interfere with their body's ability to absorb folate. Make sure to consult your doctor first.

DEAR MAYO CLINIC: Growing up, I was told to drink orange juice when I had a cold because “vitamin C is the cure.” Does vitamin C actually help us when ...

DEAR MAYO CLINIC: Growing up, I was ... “Some people may think they should double up on vitamin C supplements when feeling ill, but more is not always a good thing,” explains Dr. Bracamonte.