Abstract
Purpose
Some patients do not have the expected weight loss, and the post-surgical diet may partially explain these differences.
Objectives
To estimate the impact of macronutrient substitution on obesity remission after RYGB, considering the protein source.
Materials and Methods
This study included 58 patients undergoing RYGB. Data collection was performed preoperatively, 3 and 12 months after surgery. Eight participants dropped out of the study at 3 months, and the others remained for 12 months. The foods consumed were registered using a 24-h, 3-day food recall. For the isocaloric substitution analysis, foods were classified according to the protein source. The groups were compared using hypothesis tests, and Cox proportional hazard ratio regression was used to analyze isocaloric substitution.
Results
At three months after surgery, every 5% energy from plant protein replaced by animal protein increased by 3.50 [CI 1.204 — 10.205; p = 0.021] the probability of obesity remission. Stratified analysis by protein groups indicated that replacing vegetable protein with white meat was positively associated with remission of obesity. Every 5% vegetable protein replaced with white meat increased by 3.20 [CI 1.026 — 9.981; p = 0.045] the probability of obesity remission. Both results were independent of age, body mass index (BMI), and the presence of comorbidities.
Conclusion
The results suggest that the consumption of animal proteins after RYGB, mainly white meat, favors weight loss.
Graphical Abstract
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Funding
The coordination for the improvement of higher education personnel—CAPES Foundation (Ministry of Education, Brazil) for Scholarships awarded to D.L.S.V. and A.S. (Funding Code 001) and the National Council for Scientific and Technological Development—CNPq (Ministry of Science, Technology and Innovation, Brazil) of which J.B. is a productivity scholar.
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Contributions
Darlene Larissa de Souza Vilela: contributed to the study design, formal analysis and interpretation of the data, drafting of the manuscript, and approval of the final version.
Alessandra da Silva: contributed to the study design, formal analysis and interpretation of the data, critical review of the manuscript, and approval of the final version.
Sônia Lopes Pinto: contributed to study design, data collection and interpretation, supervision, critical review of the manuscript, and approval of the final version.
Josefina Bressan: contributed to study design, supervision, acquisition of funding for English revision, interpretation of data, critical review of the manuscript, and approval of the final version.
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Ethical Approval
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
Informed Consent
Informed consent was obtained from all individual participants included in the study.
Conflict of Interest
Darlene L.S Vilela has no conflict of interest; Alessandra Silva has no conflict of interest; Sônia L. Pinto has no conflict of interest; Josefina Bressan has no conflict of interest.
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Key Points
• Replace plant protein for animal protein increase probability of obesity remission.
• Replace plant protein for white meat increase probability of obesity remission.
• The group that achieved remission of obesity had lower BMI at baseline.
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Vilela, D.L., Silva, A., Pinto, S.L. et al. Animal Protein Intake Is Associated with Obesity Remission After Roux-en-Y Gastric Bypass: an Isocaloric Replacement Analysis. OBES SURG 33, 1382–1389 (2023). https://doi.org/10.1007/s11695-023-06539-w
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DOI: https://doi.org/10.1007/s11695-023-06539-w