Research

Adherence

Group-based support programs (Weight Watchers, Rosemary Conley) may offer better long-term adherence and less weight rebound compared to unsupported programs (Atkins, Slim-Fast) after six months.

If you find it hard to stick to a diet long-term, consider joining a group-based program (like Weight Watchers or a fitness class) rather than a self-managed book or app. The social support may help you avoid the common pattern of regaining weight after the initial 6-month success.

ModerateQualifiesMEDIUM confidence
More participants in the unsupported programmes (Atkins diet and Slim-Fast) withdrew than in the supported programmes... Statistical analysis... indicates that weight rebound after the initial six months was higher in the unsupported programmes
Helen Truby et al. · BMJ · 2006

Why this rating

Observational analysis of a subset of participants who maintained their allocated diet for 12 months; sample sizes for this subgroup are small.

Source

Randomised controlled trial of four commercial weight loss programmes in the UK: initial findings from the BBC “diet trials”

Helen Truby et al. · BMJ · 2006

DOI 10.1136/bmj.38833.411204.80

rct · n=293Cited 288×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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