Vitamin C is one of nature's most powerful antioxidants, working to protect the body from harmful free radical molecules. It's found in some concentration in fruits and vegetables; however citrus fruits, strawberries, cantaloupe, tomatoes, broccoli, potatoes and leafy greens are the best sources. The body cannot make Vitamin C on its own. Smoking, stress and certain illnesses can cause reduced levels and lead to deficiency.

Vitamin C provides antioxidant protection for many of the body's important enzyme systems. White blood cells (neutrophils) utilize Vitamin C to help produce cytotoxic enzymes, which they use to eliminate foreign matter. It is important in forming collagen, a protein that gives structure to bones, cartilage, muscle, and blood vessels. Vitamin C also aids in the absorption of iron, and helps maintain capillaries, bones, and teeth. Vitamin C plays an essential role in your body's immune system.