While vitamin C is essential for health, high doses can cause serious side effects. Learn the risks and how to use it safely, ...

Vitamin C plays a crucial role in the function of immune cells. Individuals with infections tend to have lower levels of vitamin C. However, research has not found conclusive evidence that taking ...

Vitamins D and C both play important roles in immune health, but will either prevent you from getting sick? Here's what experts want you to know.

Most people don't need a vitamin C supplement. Add these foods to your diet to meet your daily goal—and get additional ...