Cooper Aerobics Center - This clinic does the best research in the world on fitness and health. Lots of topical information oriented toward the general public.
National Institutes of Health - Central national databank for information and research. Oriented to general public as well as medical professionals.
National Library of Medicine - Search for abstracts of medical research on any topic, as well as information about clinical trials. Scientific background almost essential.
New England Journal of Medicine - Abstracts and current articles from a source often cited in news reports. Scientific background helpful.
PatientINFORM - At last!-- a web page designed to help patients make sense out of good medical research. This should be your first stop for in-depth information.
The American Academy of Family Physicians - Helpful and easy to understand general information, but sometimes too general or simplistic. Oriented toward general public.
The Mayo Clinic - Clear and authoritative information about general health and specific diseases. Good source for general public.
This website might be fun for people who like to write things down.
Web MD - Good source for general information, but more commercial orientation and less authoritative than other sources. Oriented toward general public.