vitaminA

{vision, gene expression, reproduction, embryonic development, growth, immune function} What is Vitamin A?   Vitamin D is a fat soluble vitamin obtained through diet. It includes retinol, retinyl palmitate, and beta-carotene. There are two forms: Preformed vitamin A (retinol and retinyl ester) is derived from animal sources such as meat, dairy products, and fish. Provitamin A (beta-carotenoid) is derived from colorful fruits and vegetables. Required for: cell growth immune function Eye health fetal development skin health response to inflammation Helps reduce oxidative stress protection against disease male and female re-productivity Toxicity Toxicity can occur because of the long half-life of Vitamin A in the body. Toxicity symptoms include dry skin, headaches, anorexia, nausea, bone pain, and cerebral edema. Toxicity occurs when a very high dose of Vitamin A has been taken. Therefore you should always consult with your health care provider before taking Vitamin A supplementation for correct dosage.   Deficiency symptoms: night blindness xerophthalmia (dry eyes) severely reduced immune competence delayed growth inflamed skin infertility and trouble conceiving respiratory infections slow wound healing Good Food sources Food sources include: sweet potato, spinach, pumpkin and carrots, squash, watermelon, asparagus and broccoli amongst others. DNA TESTING: The DNA Health Skin and DNA Core tests will tell you how well your body metabolises Vitamin A Sources: McEldrew EP, Lopez MJ, Milstein H. Vitamin A. [Updated 2023 Jul 10]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK482362/ Debelo H, Novotny JA, Ferruzzi MG. Vitamin A. Adv Nutr. 2017 Nov 15;8(6):992-994. doi: 10.3945/an.116.014720. PMID: 29141980; PMCID: PMC5683001. Cite this Page Institute of Medicine (US) Panel on Micronutrients. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington (DC): National Academies Press (US); 2001. 4, Vitamin A. Available from: https://www.ncbi.nlm.nih.gov/books/NBK222318/