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Adequate sleep (6-8 hours/night) is associated with reduced risk of weight regain after a low-carbohydrate diet in individuals with overweight or obesity.

In a retrospective cohort study of 294 adults with overweight or obesity who underwent a low-carbohydrate diet intervention, 52% regained weight over an average follow-up of 36.7 months. Adequate sleep of 6-8 hours per night was associated with a significantly lower odds of weight regain (OR=0.15-0.16, p<0.05), while a family history of obesity increased risk (OR=2.36-2.84, p<0.01).

Last updated: Sep 1, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score34/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Long-term weight maintenance after a low-carbohydrate diet: a real-world retrospective cohort study.

observational

Ruan Y, Hu H, Cheng Q, Deng F, Lin P, Zhu T, Zhang Q, Chen H · European journal of clinical nutrition (2026)

Participants: N/A
Duration: Average follow-up of 36.7 months
Intervention: Low-carbohydrate diet (LCD) intervention, with sleep duration assessed as a predictor of weight maintenance.
Outcome: Weight regain (defined as regaining ≥25% of initial weight loss) at least 12 months post-intervention.
Effect Size: OR=0.15-0.16 for adequate sleep (6-8 h/night) vs. inadequate sleep
Population: Adults with overweight or obesity (BMI ≥24 kg/m²) who underwent an LCD in a hospital-based weight management program.

Result:

PubMed: 42668317DOI: 10.1038/s41430-026-01815-1

Mechanism Graph

Adequate sleep may regulate appetite hormones (e.g., ghrelin, leptin), reducing hunger and caloric intake.
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Better sleep may improve adherence to dietary and lifestyle modifications.
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Sleep may influence metabolic rate and energy expenditure.
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Result: Reduced likelihood of weight regain.

Limitations

  • ⚠Retrospective design, relying on medical records and self-reported follow-up data, which may introduce recall bias.
  • ⚠Observational nature cannot establish causality; confounding factors may not be fully adjusted.
  • ⚠Sleep duration was self-reported, not objectively measured.
  • ⚠Single-center study, limiting generalizability.

Frequently Asked Questions

What is the recommended sleep duration for weight maintenance after a low-carb diet?▼

The study suggests that sleeping 6-8 hours per night is associated with a lower risk of weight regain, with an odds ratio of 0.15-0.16 compared to shorter or longer sleep.

How much weight regain was observed in the study?▼

52% of participants regained at least 25% of their initial weight loss over an average follow-up of 36.7 months.

Does a family history of obesity affect weight maintenance?▼

Yes, a family history of obesity significantly increased the risk of weight regain (OR=2.36-2.84, p<0.01).

What was the duration of the low-carbohydrate diet intervention?▼

The average duration of the LCD intervention was 6.9 ± 4.2 weeks.

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References

  1. 1.Ruan Y, Hu H, Cheng Q, Deng F, Lin P, Zhu T, Zhang Q, Chen H. "Long-term weight maintenance after a low-carbohydrate diet: a real-world retrospective cohort study.." European journal of clinical nutrition, 2026. PMID: 42668317 DOI: 10.1038/s41430-026-01815-1
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.