The company Weight Watchers funded a randomized study of 292 participants in the company’s programs that found they lost more weight by attending its in-person meetings than by using its app or online tools (Am. J. Med. 2013;126:1143e19-1143.324).
Dr. Laing reported having no financial disclosures. MyFitnessPal shared users’ log-on data with investigators for the study.
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