Vitamin D3 is derived from cholesterol. How and in which tissues does conversion occur?
Vitamin D3 is derived from cholesterol
we know that the Vitamin D3 produced inside the epidermis and it must be further metabolized to be active .
As vitamin D3 is produced in the skin out of the dehydrocholestrol by radiation.
It is found in fatty animals.
the m,ain action is of UVB (290-320nm) on 7 dehydrocholestrol in the epiderms ,
and also dermis.
It results in its conversion pre vitamin D ,
now , it then thermally isomerizes to vitamin required that is vitamin D3