PABA Para Aminobenzoic Acid
PABA, or para-aminobenzoic acid, like choline and inositol, has not yet been "officially" recognized as a vitamin. The most common use of PABA is as a sunscreen. In solution (usually alcohol), PABA applied to the skin is the most effective sunscreen available. PABA has been shown to protect animals almost completely from the cancer-causing effects of ultraviolet light. PABA has been used in oral doses ranging from twelve to twenty-four grams per day in the treatment of many skin diseases, including fibrotic skin diseases and pemphigus, Peyronie's disease, reticulum cell sarcoma, and scleroderma. Doses of one to four grams, taken every two to three hours, produced a good response in seven out of ten people with chronic discoid lupus erythematosus. No RDA has been set for PABA. Natural sources include yeast, liver, and other B vitamin sources. Supplements of PABA are available in amounts ranging from a few milligrams to several hundred milligrams. PABA is generally considered nontoxic to people. The vitamin should not be given in supplemental form at the same time as sulfa drugs, since PABA deactivates the drugs. Fatty changes in the liver, kidneys, and heart have been reported in a small number of people taking extremely large doses of PABA for extended periods of time. PABA is found in grains, yeast, and foods of animal origin.