Complementary Medicine

Pub Med Cam This site provides a search of the international database of all submitted studies on products, treatments and developments. The search is limited to only Complementary and Alternative Medicine areas. Some studies can be quite wordy and scientific and not all are fully available.
My Doctor An Australian site which attempts to look at which therapies have some evidence of benefit and which do not.
National Institute of Health National Centre for Complementary and alternative Medicine. An American government site which is funded to provide scientific research on  diverse medical and health care systems. Easy to follow.
Medline Plus Looks at individual supplements suggesting what it may and may not be useful for based on evidence and whether or not there is anything to watch out for.