National Center for Complementary and Alternative - http://nccam.nih.gov
A U.S. Government website on alternative medicine and its approaches to illness. Provides evaluations of vitamins and herbal supplements, as well as alternative forms of treatment. Some pages in Spanish.
The Alternative Medicine Homepage - http://www.pitt.edu/~cbw/altm.html
Sources of information on unconventional, unorthodox, unproven, or alternative and complementary therapies. Sponsored by the Falk Library of the Health Sciences, University of Pittsburgh.