| 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. Vitamin C also promotes the absorption of iron, while preventing its oxidation. Vitamin C is a vital co-factor to the formation of collagen, the connective tissue that supports arterial walls, skin, bones, and teeth. It also assists in the production of thyroxin, the thyroid hormone that regulates metabolic rate. 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. Physical stresses on the body such as infections, cigarette smoking, extreme temperatures, ingestion of heavy metals, and chronic use of certain medications also signal the need for increased intake of vitamin C. Along with ascorbic acid, vitamin C also comes in at least two other forms: chemically bonded to minerals as ascorbates, and as the fat-soluble ascorbyl palmitate. Both of these forms are nonacidic.
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| Ascorbic acid is the acidic form of vitamin C and even when encapsulated can cause gastric upset or diarrhea for some people. This can often be alleviated by consuming it with meals. Start with a low dose then gradually increase. If you have a stomach ulcer, an antacid, buffering agent, or a buffered form of vitamin C is suggested. Life Extension's calcium carbonate and magnesium oxide products make good antacids. Unbuffered ascorbic acid in the mouth may be harmful to tooth enamel. Doses larger than 6 grams a day may increase urinary output of oxalic acid.* |
