Question

vitamin-D is synthesized in skin by th a action of sunlight on?​

Answer 1

Answer:

the epidermal layer of skin.

during exposure to sunlight , ultraviolet radiation penetrates to the skin or epidermis and photoluses provitamin D 3.

for more information, refer to the attachment.

Explanation:

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Answer 2

Answer:

$\huge\bold\green{HOLA!!}$

Vitamin D is a hormone, not a vitamin. The skin is responsible for producing vitamin D. During exposure to sunlight, ultraviolet radiation penetrates into the epidermis and photolyzes provitamin D3 to previtamin D3. Previtamin D3 can either isomerize to vitamin D3 or be photolyzed to lymisterol and tachysterol.