MICROANATOMY

Detailed explanation-1: -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: -Vitamin D production in the skin is the primary natural source of vitamin D, but many people have insufficient levels because they live in places where sunlight is limited in winter, or because they have limited sun exposure due to being inside much of the time.

Detailed explanation-3: -A: Vitamin D acts more like a hormone than a vitamin. Unlike other vitamins, our bodies have the unique ability to make vitamin D from the sun. Studies suggest a link between vitamin D and a healthy immune system. It enhances our bodies’ ability to absorb calcium and reduces our risk of fractures and broken bones.