It has been talked about as a cure-all for everything from preventing colds and AIDS to curing cancer. The death of its biggest proponent and Nobel prize winner in Chemistry (not medicine), Linus Pauling died of cancer. Reminds me of the eye doctor on TV pushing his weight loss pills.
Vitamin C, ascorbic acid, does slow down and prevent some cell damage. It really does prevent scurvy and anemia. It is essential for the repair of bones and teeth. It helps to produce collagen and cells are held together by collagen. Collagen is found in your skin, bones, ligaments, tendons, liver, cartilage, bone marrow and blood vessels.
Occurrence of cataracts, hay fever, and asthma can be reduced, to some extent, with daily doses of the vitamin and its role in reducing common cold is known, but sometimes debated about dosage required. The body eliminates vitamin C rapidly, so it is better to take a lesser amount more often to keep it in your body.
it is not usually mentioned, but meat and potatoes both contain vitamin C. It is a preservative that can be used in jams and pickles. Kiwi has almost twice as much vitamin C as an orange.
Too much Vitamin C can cause kidney stones and also cause diarrhea.