The Health directory covers specific information about health such as child health, addictions, medicine, nursing, yoga, weight loss, pharmacy, reproductive health, specific substances.
Bioprobe
Provides information on the potential health effects of silver dental fillings that may contain up to 50% mercury.
http://www.bioprobe.com/
Hug Net
Provides information and resources on the health related issues surrounding potentially hazardous materials used in dentistry.
http://www.hugnet.com/