Given that 5.5 micrograms of the vitamin are estimated to ingested daily through food, ultraviolet rays from the sun are required to provide the other necessary 10 micrograms of vitamin D.

Here are five facts that will help you be safer in the sun. UV rays are not all the same. When we talk about sun exposure, what we really mean is exposure to ultraviolet (UV) radiation. UV-A and UV-B ...