1. Vitamin A C14448182- Malgorzata Kulicka

2. Sources

3. Types of Vitamin A Retinol Carotenes Retinal Retanoic Acid

4. Deficiency of Vitamin A

6. Diseases Keratomalacia-severe vitamin A deficiency Poor vision Dryness of the eye (xeropthalmia

7. Major Functions Prevention of cancer Prevents night blindness Embryonic development Acts as antioxidants

8. Vitamin A important for healthy vision

9. Measuring Vitamin A It is measured when deficiency is suspected, and also when there is too much of Vitamin A Symptoms include Bone or teeth problems in young children Dry or inflamed eyes Hair loss Loss of appetite Night blindess Recurring infections Skin rashes Deficiency could also occur if someone has cystic fibrosis, pancreatitis, celiac disease

10. Measuring Vitamin A in the Lab Serum Retinol Testing Isotope dilution assay

11. References Sherry A Tanumihardjo. Vitamin A: biomarkers for nutrition for development. Am J Clin Nutr 2011; 94(2):658S-665S. Comprehensive Guide to Vitamin A, Dr James Meschino Judy D Ribaya-Mercado, Manolo Mazariegos, Guangwen Tang, Maria Eugenia Romero-Abal, Ivania Mena, Noel W Solomons, Robert M Russell. Assesment of total body stores of Vitamin A in Guatemalan ederly by the deutrarated retinol-dilution method. American Journal of Clinical Nutrition 1999;69(2):278-284.) Retinol-Binding Protein, Random, Urine- Mayo Clinic Medical Laboratories. Vitamins and Minerals-Vitamin A (NHS choices)- http://www.nhs.uk/Conditions/vitamins-minerals/Pages/Vitamin- A.aspx U.S. National Library of Medicine- Vitamin A