How long...

Posts 16–17 of 17 · Page 2 of 2

no school .

Originally Posted by argusomega1

Do they suplement with you the needed D-3 only obtained through UV rays from the sun and nothing else(known to man).

Vitamin D3 is produced in the skin of vertebrates after exposure to ultraviolet B light from the sun or artificial sources, and occurs naturally in a small range of foods