tomorrow.pptx where does centrifugal force come into play

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1. Vitamin D Rimsha Rizwan 206- bh - chem -20(Morning ) Semester VIII

2. Contents Introduction forms of VIT D Sources Metabolism Function Deficiency Testing

3. What is Vitamin D? Fat Soluble Vitamin Found in food Absorbed through sunlight exposure Converted to hormone form through liver and kidney

4. Two Major Forms of Vitamin D Vitamin D 2 , ergocalciferol Vitamin D 3, cholecalciferol

5. Other Forms of Vitamin D Vitamin D 1 : molecular compound of ergocalciferol with lumisterol , 1:1 Vitamin D 4 : 22-dihydroergocalciferol Vitamin D 5 : sitocalciferol (made from 7-dehydrosisterol)

6. Exposure to sunlight Important source of vitamin D Season, latitude, time of day

7. What does Vitamin D do? Maintain normal blood levels of Calcium and Phosphorus Aids in absorption of calcium Promotes bone mineralization Prevents rickets in children and Osteomalacia in adults

8. How much Vitamin D do we need? Ages 19-50: 200 International Units (IU) Ages 51-69: 400 IU Age 70 and older: 600 IU

9. When can vitamin D deficiency occur? Rickets Osteomalacia

10. Who may need extra vitamin D to prevent a deficiency? Older Americans (greater than age 50) individuals with limited sun exposure occupations that prevent exposure to sunlight reduced ability to absorb dietary fat exclusively breast-fed infants 

11. What is the health risk of too much vitamin D? nausea vomiting poor appetite constipation weakness weight loss

12. Testing

13. What does the test result mean? 25 OH Vitamin D test   Low blood levels = not getting enough exposure to sunlight problem with absorption from the intestines High levels = supplementation from vitamin pills or other nutritional supplements 1,25 di OH Vitamin D test Low levels = kidney disease  one of the earliest changes to occur in persons with early kidney failure. High levels = excess parathryoid hormone diseases such as sarcoidosis  or some lymphomas, that can make 1,25 di OH Vitamin D outside of the kidneys

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