Vitamin d is known as a fat-soluble vitamin, but is actually a group of fat-soluble secosteroids of which two, ergocalciferol and cholecalciferol, are important for humans. In the human body cholecalciferol can be synthesized from cholesterol in sun-exposed skin, hence its nickname the 'sunshine vitamin. Â.
Vitamin d is known as a fat-soluble vitamin, but is actually a group of fat-soluble secosteroids of which two, ergocalciferol and cholecalciferol, are important for humans. In the human body cholecalciferol can be synthesized from cholesterol in sun-exposed skin, hence its nickname the 'sunshine vitamin. Â.