http://www.pueblo.gsa.gov/cic_text/health/works4you/weightloss.htm
Federal Citizen Information Center, U.S. General Services Administration
Perhaps you're planning to try one of the many available weight loss products or services, but aren't sure which one is right for you. The Partnership for Healthy Weight Management encourages providers of weight loss programs to follow Voluntary Guidelines for Providers of Weight Loss Products or Services to give you basic information about their methods. The first part of this booklet describes the type of information participating programs provide and helps you ask the right questions to choose a safe and effective weight loss method. The second part helps you tell whether your weight puts you at risk for health problems.