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the claim

Roux-en-Y surgery suppresses hunger by altering gut hormone signaling

the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Roux-en-Y surgery suppresses hunger by altering gut hormone signaling?

Yes. Evidence from clinical reviews and studies confirms that Roux-en-Y bariatric surgery alters gastrointestinal anatomy and promotes changes in gut hormone signaling—specifically increasing satiety hormones like GLP-1 and PYY and altering ghrelin—which help suppress hunger and food intake.

Verdict: SUPPORTED · 5 sources for, 0 against · Last checked

The analysis

Multiple contemporary reviews and clinical studies confirm that bariatric surgeries, including Roux-en-Y gastric bypass, induce structural and physiological changes in the GI tract that lead to enhanced secretion of satiety-promoting gut hormones (such as GLP-1 and PYY) and altered ghrelin signaling, thereby suppressing appetite and hunger. None of the retrieved papers contradict this physiological mechanism.

Evidence for · 5
Ghrelin, glucagon-like peptide-1, and peptide YY secretion in patients with and without weight regain during long-term follow-up after bariatric surgery: a cross-sectional study
2022
Discusses GI hormone secretion patterns following bariatric surgeries like Roux-en-Y variants.
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Lampropoulos, C., Mulita, F., Alexandrides, T., Kehagias, D., Kalavrizioti, D., Albanopoulos, K., Georgopoulos, N., Papachristou, E., & Kehagias, I. (2022). Ghrelin, glucagon-like peptide-1, and peptide YY secretion in patients with and without weight regain during long-term follow-up after bariatric surgery: a cross-sectional study. doi.org. https://doi.org/10.5114/pm.2022.116492

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More for · 4
Obesity as a Multifactorial Chronic Disease: Molecular Mechanisms, Systemic Impact, and Emerging Digital Interventions.
2025
Recognizes gut-derived hormones such as GLP-1 and PYY as pivotal regulators of appetite and energy balance after bariatric interventions.
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E, M., K, B., A, B., H, F., M, G., N, K., J, R., & B, F. (2025). Obesity as a Multifactorial Chronic Disease: Molecular Mechanisms, Systemic Impact, and Emerging Digital Interventions.. doi.org. https://doi.org/10.3390/cimb47100787

Hormonal Alterations in Individuals with Obesity After Metabolic Bariatric Surgery: A Narrative Review
2025
Highlights that metabolic bariatric surgery alters gastrointestinal anatomy to enhance secretion of GLP-1 and PYY, suppressing appetite.
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Anastasiou, I., Kounatidis, D., Rebelos, E., Vallianou, N., Tentolouris, A., Tentolouris, N., Dalamaga, M., & Karampela, I. (2025). Hormonal Alterations in Individuals with Obesity After Metabolic Bariatric Surgery: A Narrative Review. doi.org. https://doi.org/10.3390/medicina61101724

Peptide YY in Type 2 Diabetes: A Complementary Gut Hormone with Therapeutic Potential Beyond GLP-1
2025
Notes that PYY levels substantially increase after bariatric surgery, playing a pivotal role in suppressing appetite.
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Nguyen, N. T. & Park, J. (2025). Peptide YY in Type 2 Diabetes: A Complementary Gut Hormone with Therapeutic Potential Beyond GLP-1. doi.org. https://doi.org/10.3390/nu17213468

Neurobiological and Microbiota Alterations After Bariatric Surgery: Implications for Hunger, Appetite, Taste, and Long-Term Metabolic Health
2025
Indicates that bariatric surgery modulates appetite-regulating hormones by reducing ghrelin and increasing GLP-1 and PYY to decrease caloric intake.
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Chapela, S., Álvarez-Córdova, L., Martinuzzi, A., Suárez, R., Gonzalez, V., Manrique, E., Castaño, J., Rossetti, G., Cobellis, L., Pilone, V., Frías-Toral, E., & Schiavo, L. (2025). Neurobiological and Microbiota Alterations After Bariatric Surgery: Implications for Hunger, Appetite, Taste, and Long-Term Metabolic Health. doi.org. https://doi.org/10.3390/brainsci15040363

What does the evidence say?

Multiple contemporary reviews and clinical studies confirm that bariatric surgeries, including Roux-en-Y gastric bypass, induce structural and physiological changes in the GI tract that lead to enhanced secretion of satiety-promoting gut hormones (such as GLP-1 and PYY) and altered ghrelin signaling, thereby suppressing appetite and hunger. None of the retrieved papers contradict this physiological mechanism.

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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