Question

how the sunlight is absorbed in our body for synthesis of vitmin D? is thier any pigment like chlorophyll in plant for absorbing light in our body?

Answer 1

Vitamin D is produced when our bare skin is exposed to sunlight (ultraviolet B rays). Ultraviolet B from sunlight is absorbed by chemical (7-dehydrocholesterol) present in our skin and transforms it into pre-vitamin D₃. Pre-vitamin D₃ isomerizes to form vitamin D₃ in the liver and finally then in the kidney to its biologically active form(cholecalciferol) .

There is no pigment present in our body in order to absorb light.