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.
The ultraviolet radiation in sunlight has both positive and negative health effects, as it is both a principal source of vitamin D3 and a mutagen.[1] A dietary supplement can supply vitamin D without this mutagenic effect.[2] Vitamin D has a wide range of positive health effects, which include strengthening bones[3] and possibly inhibiting the ...