High doses of vitamin C can help slow the spread and growth of colon, pancreatic, liver, prostate and other types of cancer cells, according to the National Cancer Institute. Vitamin C, when taken in high doses, can also improve physical, emotional and mental functions as well as minimize symptoms of nausea, pain, appetite loss, vomiting and fatigue in patients with cancer.
Supplementing the diet with vitamin C also helps with wound healing, the production of collagen and the protection of cells, explains WebMD. Vitamin C provides support for organs, tissues, bones, blood vessels and the skin. People who consume vegetables such as sprouts, broccoli and kale benefit from adding vitamin C to their diets because the vitamin increases the iron absorbed from vegetables and plant sources.
Vitamin C works as an antioxidant and protects the body from damage caused by pollutants and toxic chemicals, according to WebMD. Antioxidants in vitamin C can also work to strengthen the body's cells that provide protection against arthritis, heart disease and cancer.
People who smoke benefit from high doses of vitamin C because smoking reduces the amount of vitamin C absorbed in the blood and tissues, explains WebMD. The body recognizes the amount of vitamin C a person requires and excretes the remainder of the vitamin through urine.