US Department of Agriculture
Food and Nutrition Topics a to Z
More than just food and nutrition links can be found in this index of health topics. The USDA's Food and Nutrition Information Center provides access to a world of health information.
WebMD
Web Md: Magnesium Hydroxide
This site provides information on magnesium hydroxide when used as a dietary supplement. Content includes information on how to use it, some common side effects, precautions to follow, and more.