Vitamins Vitamin A Vitamin B Vitamin C Vitamin D Vitamin E Beta Carotene Lutein Lycopene Folic Acid Profiles

Vitamin A or Retinol Vitamin A is measured in serum which must be protected from light. It may be run separately or as part of a lipid vitamin profile. The profile includes vitamins A, E, beta carotene, lutein, and lycopene. The methodology is by HPLC. Some of the functions of vitamin A are in the body's vision, mucous membranes, cell division, skin maintenance, sperm production, egg development, growth, bone development and cancer prevention. Symptoms indicate a deficiency of vitamin A in the body include poor vision, night blindness, "bumps" on skin, lower disease resistance, stunted growth, pregnancy problems, acne, and xerosis. Preformed vitamin A is found mainly in animal meats. Beta carotene is composed of two vitamin A molecules and is found in green or orange vegetables, and fruits. These include carrots, squash, spinach, apricots, etc. The RDA for vitamin A is 3000 I.U. per day. A supplemental dose could range from 5000 to 10,000 I.U. A toxic dose may occur at 25,000 to 50,000 I.U. The body will convert beta carotene to vitamin A if the thyroid is functioning properly and the patient does not have diabetes. These two conditions may lead to a high serum beta carotene and low serum vitamin A. The normal range in our method (HPLC) is 24 to 90 µg/dL. For references and methodology, see the Vitamin A, E , Beta carotene, lutein, and lycopene Profiles. Back to Vitamin Home Page

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