Who discovered that UV rays stimulates the body's production of vitamin D and when?
Answer:
The website has your answer. This is what it say....
In 1936, Windaus synthesized the molecule 7-dehydrocholesterol and, then converted it by irradiation to vitamin D3, presently known as cholecalciferol. Although it be assumed that vitamin D was photosynthesized contained by the skin from 7-dehydrocholesterol, the final proof did not emerge until more than three decades later. A Wisconsin squad led by R. P. Esvelt and one lead by Michael F. Holick at the Endocrine Unit of Massachusetts General Hospital then independently demonstrated that vitamin D3 is, surrounded by fact, what is produced surrounded by the skin through irradiation.
Darn good query and even a better answer from the first answerer!