http://asbp.org/ - The American Society of Bariatric Physicians (ASBP)
Is a professional medical society of licensed physicians who specialize in the medical treatment of obesity (bariatrics) and its associated conditions. Formed in 1950, ASBP has been instrumental in offering practical information that doctors can use in their bariatric practices, and supporting public policies to prevent overweight and obesity.

http://www.abbmcertification.org/ - American Board of Bariatric Medicine
Is a certification board for physicians focused on the medical management of obesity. Our areas of emphasis are: Diet, Exercise, Behavioral Modification, Pharmacotherapy.

http://www.diabetes.org/ - American Diabetes Association
Is the nation's leading nonprofit health organization providing diabetes research, information and advocacy. The mission of the Association is to prevent and cure diabetes and to improve the lives of all people affected by diabetes.

http://www.eatright.org/ - American Dietetic Association
Is the nation's largest organization of food and nutrition professionals. 

http://www.americanheart.org - American Heart Association
Is a national voluntary health agency whose mission is to reduce disability and death from cardiovascular diseases and stroke.

http://www.ama-assn.org/ - American Medical Association
Promotes the art and science of medicine and the betterment of public health.

http://www.obesity.org/ - American Obesity Association

http://www.ama-assn.org/
Is the only obesity organization focused on changing public policy and perceptions about obesity. In only a few years we have become an authoritative source for policy makers, media, professionals and patients on the obesity epidemic. 
Government Resources

http://www.usda.gov/cnpp" - Center for Nutrition Policy and Promotion
Works to improve the health and well-being of Americans by developing and promoting dietary guidance that links scientific research to the nutrition needs of consumers.

http://www.fda.gov/ - Food and Drug Administration
Is the Nation's Premier Consumer Protection And Health Agency Comprised of a team of 9,000 dedicated public health employees that includes physicians, nurses, consumer safety officers, lawyers, and scientists, with specialties ranging from biomaterials engineering to pharmacology. Decisions made by FDA affect every American every day. In 2000, consumers spent $1 trillion hundreds of thousands of products whose safety and effectiveness is our responsibility.

http://www.niddk.nih.gov/ - National Institute of Diabetes and Digestive and Kidney Diseases (NIH)
Conducts and supports research on many of the most serious diseases affecting public health. The Institute supports much of the clinical research on the diseases of internal medicine and related subspecialty fields as well as many basic science disciplines

http://www.consumer.gov/weightloss - Partnership for Healthy Weight Management.

http://www.niddk.nih.gov/
Is a coalition of representatives from science, academia, the health care profession, government, commercial enterprises and organizations whose mission is to promote sound guidance on strategies for achieving and maintaining a healthy weight.

http://www.shapeup.org/ - Shape Up America!
Is a high profile national initiative to promote healthy weight and increased physical activity in America. Involving a broad-based coalition of industry, medical/health, nutrition, physical fitness, and related organizations and experts, Shape Up America! has three primary objectives:
• Promote a new understanding by Americans of the health importance of achieving and maintaining a healthy weight and increasing physical activity;
• Inform Americans of the logical, proven ways to achieve a healthy body weight;
• Increase cooperation among national and community organizations committed to advancing healthy weight and increased physical activity as major public health priorities.

http://www.hoptechno.com/book11.htm - President's Council on Physical Fitness and Sports
Is a guild on starting your fitness program.

http://www.niddk.nih.gov/health/nutrit/win.htm - Weight-control Information Network
Provides you with up-to-date, science-based information on weight control, obesity, physical activity, and related nutritional issues.