Vitamin C, or ascorbic acid, is a white, crystalline, water-soluble substance found in citrus fruits and green vegetables. As an antioxidant, vitamin C scavenges free radicals in the body and protects tissues from oxidative stress.^1-8 Vitamin C also promotes the absorption of iron, while inhibiting its oxidation.^9,10 Vitamin C is a vital co-factor to the formation of collagen, the connective tissue that supports arterial walls, skin, bones, and teeth.^11-13

More vitamin C is contained in the adrenal glands than any other organ in the body and is required at higher levels during times of stress.^14-17 Physical stresses on the body such as ingestion of heavy metals,^18-23 cigarette smoking,^24-27 immune impairment,^28-34 extreme temperatures,^35-39 and chronic use of certain medications such as aspirin also signal the need for increased intake of vitamin C.⁴⁰