These studies were a follow-up to a 2005 system-wide review of these weight-loss programs, whether commercial or proprietary. Two-thirds of Americans are overweight to obese, which could lead to high blood pressure, heart conditions, type 2 diabetes, or a combination of these.
According to New York Magazine, Gudzune realized that most of the 4,200 studies were ineffective and not rigorous enough, like the 39 12-week trials. Low-calorie weight-loss programs, like Optifast, Health Resources Management, and Medifast, offered initial success, showing a 4 percent weight loss in six months as opposed to control groups.
Folks trying Nutrisystem did lose 3.8 percent more weight than those in a control group for the first three months. As for self-directed plans like SlimFast and online programs like eDiets and Lose It!, as well as the rest of the weight-loss programs, there simply wasn’t enough data for any kind of conclusion to be made. Even the most successful weight-loss programs, Weight Watchers and Jenny Craig, show that weight that is lost is most likely to return.
However, there is very little scientific evidence that those weight-loss programs actually work.
Though Weight Watchers can provide modest results, nutritional counselling would provide, better, longer-lasting results. But, since the trial only lasted three months, there’s no substantial data past that initial three-month period. The problem now is that weight-loss programs like Weight Watchers are losing market share to newer weight-loss programs. The new trials show that only one, Weight Watchers, have modest success with losing weight.
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