Want to lose weight?

Scientists: These two commercial weight loss plans work best to keep pounds away

Looking to shed those extra pounds? If you’ve ever wondered which commercial weight loss plans in the crowded market are worth the money, scientists now have an answer. Or at least a partial answer.

In a new journal article published on Tuesday, scientists found that there’s only enough evidence to conclude that two of the 32 major plans — Weight Watchers and Jenny Craig — will keep weight off for at least a year. Researchers Kimberly Gudzune and Ruchi Dosi from Johns Hopkins University noted that some other popular programs, and Nutrisystem specifically, show “promising” results, but that more work is needed to evaluate whether the effects will last for the long-term.

The study found that at 12 months, Weight Watchers participants saw at least a 2.6 percent greater weight loss than those not on the plan, while Jenny Craig resulted in a 4.9 percent greater weight loss. That compares with 0.1 percent to 2.9 percent for Atkins during a similar time period, according to the study which was published in the Annals of Internal Medicine on Tuesday. Participants saw a greater weight loss at six months for very low-calorie plans — at least 4 percent for Medifast and OPTIFAST — but that initial loss appeared to taper off in subsequent months.

Weight loss is a $2.5 billion and growing industry in the United States. With more than a third of U.S. adults obese and many more seeking to lose that extra 10 to 15 pounds, commercial weight loss programs — which cost anywhere from around $50 to $700 a month — have become increasingly popular tools. But physicians haven’t had a lot of information to be able to recommend certain commercial programs, other diets or education and counseling.

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