Who invented sunscreen from crushed castor beans?

Egyptian shepherds made sunscreen from crushed castor beans in 780013.c.

Today, the main ingredients in sunscreens are usually aromatic molecules conjugated with carbonyl groups whichabsorb high-energy ultraviolet rays.

Sunscreens also block UV-B rays, and if used often enough, this can cause a deficiency of vitamin D.

Get some sun, but not too much, is the general advice of the day.