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Weight Watchers is one of the most studied commercial programs.
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At 12 months, members lost about 2.6% more than control groups.
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Losing 5% of body weight can improve blood pressure and blood sugar.
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Points, check-ins and group support make habits easier to keep.
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Plans and promotions change often, so look up current costs.
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Free calculators give you the same core numbers if you prefer solo.
Weight Watchers (WW) is one of the most studied commercial programs. Here's what the research shows about results, and how to judge if it fits you.
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