1. Cholecalciferol „Vitamin D“

2. Structure

3. Sources -Sunlight -It is built with ultraviolet light in the skin from 7- Dehydrocholesterol -Fishes -They have to be fatty -Artificial „healthy“ food products -It is artificially produced and added to the food

4. Function -Gets transported by vitamin D-bonding-protein in the blood to the liver -It gets also into the kidney and is formed into Calcitriol, which is used as a steroidhormone

5. Deficiency Rachitis Higher risk of heart-disease Intestine cancer Autumn & Winter Northern Countries