HUMAN NUTRITION

Detailed explanation-1: -Vitamin D is the sunshine vitamin that has been produced on this earth for more than 500 million years. During exposure to sunlight 7-dehydrocholesterol in the skin absorbs UV B radiation and is converted to previtamin D3 which in turn isomerizes into vitamin D3.

Detailed explanation-2: -Many people can produce enough vitamin D by spending roughly 30 minutes in the sun a few times a week, but that isn’t true for everyone. The amount of vitamin D the body produces in the sun varies from person to person and depends on your physical environment.