Share this credible answer with others. Simply paste this code into your blog or Web page:
Daily requirements are estimated at 30 mcg for adults in the United States and 35 mcg for women who are nursing. Supplementation ranges from 100-600 mcg per day.
|
Answer verified with
|
HighBeam gives you access to newspaper, magazine, and trade journal articles plus press releases, facts, information, and biographies from thousands of sources.