This is a website that contains large amounts of infomation on vitamins & minerals.

Attribution:

"Dietary Supplements: Vitamin & Mineral Supplements." Providing Nutrition Information for a 

Healthier Life. Nutrition.gov: Smart Nutrition Starts here, 14 Jan. 2010. Web. 17 May 2010. 

 
                    
 index?info_center=11&tax_level=2&tax_subject=393&topic_id=1762&placement_default=0>.