Remarks by President Obama in Address to the United Nations General Assembly. United Nations. New York, New York. 10:12 A.M. EDT. PRESIDENT OBAMA: Mr. President, Mr. Secretary General, fellow delegates, ladies and gentlemen: It is a great honor for me to be here today. I would like to talk to you about a subject that is at the heart of the United Nations -- the pursuit of peace in an imperfect world.
Ultraviolet (UV) Exposure Is Not the Answer. Our bodies manufacture vitamin D when the sun's ultraviolet B (UVB) rays interact with 7-dehydrocholesterol (7-DHC) present in the skin. However, we can produce only a limited amount of vitamin D from UVB.
Tanning indoors is not a desirable source of vitamin D. The reason is because of the harmful characteristics of ultraviolet light rays, and the effects they have on the body. Both the sun and tanning booths send out two kinds of ultraviolet light rays â UVA and UVB. Your skin absorbs both types, but in alternate ways.