Peptide YY

Peptide YY (PYY) is primarily being investigated for its role in appetite regulation and metabolic health, with emerging research exploring its potential in various clinical contexts.

Obesity and Weight Management

The primary clinical focus for PYY involves its therapeutic potential in controlling overweight and obesity. A 2026 narrative review highlighted the promise of modulating endogenous PYY expression as a strategy for weight management, though specific clinical outcomes from this review are not detailed in the available evidence.

Clinical trials have examined PYY responses in various dietary and surgical contexts related to obesity:

• Studies have investigated L-cell activity (which produces PYY) in the small intestine following Roux-en-Y gastric bypass (RYGBP) surgery in obese patients with diabetes
• Research has examined gut hormone responses, including PYY, after consumption of Paleolithic-type meals
• Trials have explored the relationship between PYY and other appetite-regulating factors in adolescents

Metabolic Disorders

Limited evidence suggests potential applications in metabolic health:

• A 2026 study examined the relationship between appetite hormones (including PYY) and body mass index in children with intoxication-type metabolic diseases, though specific findings are not provided in the available evidence
• Research has investigated PYY alongside other gut hormones in the context of glucose homeostasis and dietary interventions

Gastrointestinal Applications

PYY has been studied in relation to:

• Food intake and gut hormone responses in patients who have undergone upper gastrointestinal surgery for cancer
• Intestinal motility and barrier function, as suggested by research on gut microbiota interactions that may influence PYY production

Safety and Pharmacokinetics

A completed Phase 1 safety and pharmacokinetic study (NCT01515319) examined a PYY-related compound (Y242) in adult subjects, indicating clinical development efforts, though specific safety or efficacy outcomes are not provided in the available evidence.

Important Limitation: The current evidence base provides limited detail on specific clinical outcomes, efficacy measures, or safety profiles for PYY interventions. Most studies appear to be in early phases or focus on mechanistic understanding rather than established therapeutic applications.

This information is for educational purposes only and should not replace consultation with healthcare providers for medical advice.