American Obesity Association (AOA)
Advocates of education and research, the AOA site features a wealth of information, including a Patients’ Bill of Rights and a BMI Calculator.

Association for Morbid Obesity Support
Visit this empowering site for information on morbid obesity resources by state, information and patients’ comments on individual surgeons, message boards, chats and surveys.

American Society for Metabolic and Bariatric Surgery (ASMBS)
This site includes extensive information about bariatric surgery, its history and process, and includes a BMI Calculator and a database of member surgeons.

National Institutes of Health (NIH)
NIH is one of the world's foremost medical research centers. An agency of the U.S. Department of Health and Human Services, the NIH is the Federal focal point for health research. The NIH website offers health information for the public as well as medical professionals.