Research

Mixed

Long-term weight loss maintenance using a low-carbohydrate diet is possible and results in no greater weight regain compared to other dietary approaches over a 3-year period.

If you have successfully lost weight using a low-carbohydrate approach, you can likely maintain that loss long-term without needing to drastically increase your physical activity or dietary restraint compared to others. The key is adherence to your chosen dietary pattern, regardless of whether it involves higher fat intake or lower exercise volumes, as long as you maintain your weight loss.

ModerateSupportsMEDIUM confidence
It is possible to achieve and maintain long-term weight loss using a low-carbohydrate diet... No differences in 3-year weight regain were observed between low-carbohydrate dieters and other Registry members in intent-to-treat analyses (7.0 (+/-) 7.1 vs. 5.7 (+/-) 8.7 kg).
Suzanne Phelan et al. · Obesity · 2007

Why this rating

Observational cohort study (National Weight Control Registry) with self-reported data and significant attrition, though intent-to-treat analysis mitigates some bias.

Source

Three‐Year Weight Change in Successful Weight Losers Who Lost Weight on a Low‐Carbohydrate Diet

Suzanne Phelan et al. · Obesity · 2007

DOI 10.1038/oby.2007.293

cohort · n=891Cited 41×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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