Much of the weight loss industry likes to focus on overweight Americans. That’s where the money is for them. But the truth is, much of the world is overweight, too.
Studies showed that in 2000, 45% of adults all over the world were overweight. Overweight people are more likely to have chronic health problems such as diabetes, high blood pressure, and knee arthritis. Overweight people also die at younger ages than persons of normal weight.
Many overweight people want to lose weight to improve their health and their appearance. Because so many people want to loose weight and doing it is difficult there are many commercial weight loss programs on the market. Many are expensive, capitalizing on the huge demand. Of those programs many are ineffective.
Each year millions of Americans and Europeans enroll in commercial and self-help weight loss programs. Health care providers and their obese patients know little about these programs because of the absence of systematic reviews. Unfortunately, many patients and their doctors know little about the effectiveness and safety of these programs, either.
Few high-quality studies have assessed weight loss...