DEAR MAYO CLINIC: Growing up, I was ... Mayo Clinic Q and A: Does vitamin C help us when we’re sick? ... Make sure you do not consume more than the recommended daily dose of 500 milligrams.

“Overall, though, vitamin C taken in extra doses to prevent common colds hasn’t proven true,” says Dr. Bracamonte. Dr. Jesse Bracamonte, a Mayo Clinic family physician, explains more about ...

In addition, vitamin D can improve the body's immunity, helping fight off disease and viruses, according to the Mayo Clinic. Vitamin D also regulates many other cellular functions in the body.

In addition, vitamin D can improve the body's immunity, helping fight off disease and viruses, according to the Mayo Clinic. Vitamin D also regulates many other cellular functions in the body.

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 told to drink orange juice when I had a cold because “vitamin C is the cure.” Does vitamin C actually help us when ...