Vitamins

Vitamin A

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Vitamin A, Retinol, Retinoic Acid

  • See also
  1. Vitamin A Deficiency
  2. Carotenoids (Beta Carotene)
  • Physiology
  • Function
  1. Vision
    1. Forms Carotenoid Proteins
  2. Epithelial Cell function
    1. Forms Glycoproteins
  3. Vitamin A stores
    1. Most of Vitamin A (90%) is stored in the liver and released as needed
  • Pathophysiology
  1. Vitamin A Deficiency
    1. Night blindness
    2. Dry Cornea
    3. Dry Skin
  2. Vitamin A Toxicity or Overdose
    1. Vomiting
    2. Headache
    3. Altered Mental Status
    4. Alopecia
    5. Peeling skin
  • Preparations
  • Sources
  1. Animal products
    1. Liver (beef liver, cod liver oil)
    2. Chicken meat
    3. Egg yolk
    4. Fish oil
  2. Dairy products
    1. Whole milk
    2. Butter
    3. Margarine fortified with Vitamin A
  3. Dark green leafy vegetables
  4. Yellow-orange fruits and vegetables
    1. Apricot
    2. Cantaloupe
    3. Carrots
    4. Oranges
    5. Papayas
    6. Pumpkin
    7. Squash