Organizations devoted to weight management:
The American Society of Bariatric (weight management) Physicians
http://www.asbp.org/bariatrics
Voluntary guidelines for the weight loss industry drafted by the US government
http://www.consumer.gov/weightloss
North American Association for the Study of Obesity
http://www.naaso.org
NIH weight management program guidelines
http://www.nih.gov
American Obesity Association: this organization is devoted to consumer interests related to obesity
http://www.obesity.org