Fact-Checked·Verified against peer-reviewed sources · Last updated Oct 24, 2026·For research use only - not for human consumption
Metabolic / WeightActive Research

Peptide YY

Also known as: PYY · pyy 3-36 · pyy3-36 · peptide YY 3-36 · PYY 3-36 · peptide tyrosine tyrosine

For in-vitro (laboratory) research purposes only. Not for human or animal consumption.

Peptide Stores Online branded research vialCOMING SOON

Available Forms

InjectableOral

Research Applications

Fat LossHormonal Balance

Check independent lab results, free

Finnrick Analytics publishes independent lab test results for peptide products from named vendors, and anyone can check the published results for free.

For in-vitro research use only. Not for human consumption.

1What Is Peptide YY?

Gut-derived peptide studied for appetite suppression and regulation of energy intake.

4Published Research - Plain English Summaries

The studies below have been published in peer-reviewed journals. Summaries are written in plain language - no jargon. Citations are provided as text only.

review

Fan Z, Chen Y, Li Y, Dong Y, An X, Li J, Su L, Wu D · 2027 · Microbiological research · PMID 42854469

other

Amerikanou C, Kleftaki SA, Tzavara C, Vourtsi A, Gioxari A, Kaliora AC · 2026 · Diabetes, obesity & metabolism · PMID 42881118

animal study

Bullich-Vilarrubias C, Romaní-Pérez M, López-Almela I, Pomares-Díaz C, Franzin SB, Esposito G, Benítez-Páez A, Tolosa-Enguís V, Sanz Y · 2026 · Gut microbes · PMID 41566927

other

Key finding: One subgroup showed fast gastric emptying, stronger postprandial hunger, and lower plasma PYY and GLP-1, with reduced PYY gene expression in colonic mucosal samples and greater weight loss on tirzepatide at six months in a retrospective comparison.

A 2026 study of 483 adults with obesity profiled gut hormones including peptide YY and grouped participants by gastric emptying speed and GLP-1 levels after a meal.

Ticho AL, McRae AN, Cifuentes L, Fredrick T, Anazco D, Espinosa MA, Garcia Cordova JM, Romanos M, Villamarin J, Johnson S, Lennon R, Hurtado Andrade MD · 2026 · Gastroenterology · PMID 42250890

other

Kochan-Olszewska D, Kopczyński J, Kowalska A · 2025 · Endokrynologia Polska · PMID 40728419

other

Pierre JF, Peters BM, La Torre D, Sidebottom AM, Tao Y, Zhu X, Cham CM, Wang L, Kambal A, Harris KG, Silva JF, Zaborina O · 2023 · Science (New York, N.Y.) · PMID 37535745

other

Ferraz-Bannitz R, Kashyap S, Patti ME · 2022 · The Journal of clinical endocrinology and metabolism · PMID 34543416

review

Persaud SJ, Bewick GA · 2014 · Diabetologia · PMID 24917132

review

Chandarana K, Batterham R · 2008 · Current opinion in endocrinology, diabetes, and obesity · PMID 18185065

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All content on this page is for in-vitro research purposes only. Not intended for human or animal use. Consult a licensed professional before handling research chemicals. No content on this page constitutes medical advice or a treatment recommendation.

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All products listed on Peptide Stores Online are for in-vitro laboratory and educational research purposes only. Not for human or animal consumption. Not evaluated by the Food and Drug Administration. Not intended to diagnose, treat, cure, or prevent any disease or condition. All sellers and buyers agree to full research-use-only terms at account creation. Peptide Stores Online assumes no liability for misuse of any product listed on this platform.