Vitamin_A_PPT_with_functions_placeholders.pptx

Vitamin a

1. Vitamin A – Chemistry, Functions & Deficiency By: [Your Name]

2. Introduction Fat-soluble vitamin First vitamin discovered (Retinol) Essential for vision, growth, immunity & reproduction

3. Chemistry of Vitamin A Family: Retinoids (Retinol, Retinal, Retinoic acid) Structure: Derived from β-carotene (provitamin A) Active forms: Retinol (alcohol), Retinal (aldehyde), Retinoic acid (acid form) Storage: Mainly in liver (as retinyl esters) [Insert Vitamin A chemical structure image here]

4. Sources Animal sources: Liver, fish oils, milk, eggs, butter Plant sources (Provitamin A carotenoids): Carrots, spinach, pumpkin, mango [Insert food source images: carrot, spinach, liver, fish, egg]

5. Functions Vision – Retinal forms rhodopsin (night vision) Cell growth & differentiation – Retinoic acid regulates gene expression Immunity – Maintains epithelial tissues, enhances immune defense Reproduction – Needed for spermatogenesis & fetal development Antioxidant role (β-carotene) [Insert eye diagram image here]

6. Deficiency – Symptoms Ocular: Night blindness, Xerophthalmia, Bitot’s spots, Keratomalacia Other: Growth retardation, Reduced immunity, Skin changes [Insert image of Bitot’s spots or keratomalacia]

7. Prevention & Treatment Balanced diet (vegetables, milk, eggs, liver, fish) Vitamin A supplementation programs Public health fortification (milk, oils) [Insert nutrition/food supplementation program image here]

8. Summary Vitamin A = essential for vision, immunity, growth Deficiency → night blindness, xerophthalmia, keratomalacia Both deficiency & excess are harmful [Optional: Insert summary infographic image]