Adherence
A structured commercial weight loss program provides significantly greater weight loss and maintenance compared to self-help methods over a 2-year period.
To lose and maintain weight, you need structure. This study shows that a structured commercial program (like Weight Watchers) leads to significantly more weight loss (approx. 3 kg more) than self-help over two years. The key is consistent attendance at weekly meetings, which provides accountability, social support, and cognitive restructuring. If you try to do it alone, you are likely to regain the weight you lose.
The structured commercial weight loss program provided modest weight loss but more than self-help over a 2-year period.
Why this rating
Randomized clinical trial with high retention (73%) and long duration (2 years), though funded by a commercial entity.
Source
Weight Loss With Self-help Compared With a Structured Commercial Program
Stanley Heshka et al. · JAMA · 2003
DOI 10.1001/jama.289.14.1792
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