Patient-Friendly Explanation

The incretin effect is the body’s natural ability to release more insulin when you eat food by mouth, compared with receiving the same amount of sugar directly into the blood. It is driven by gut hormones called incretins, mainly GLP-1. Many modern weight-loss and diabetes medicines work by boosting this system.

Clinical Definition

The incretin effect describes the greater insulin secretory response to oral glucose than to an equivalent intravenous glucose load, mediated largely by the gut hormones glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP). The effect is blunted in type 2 diabetes, and its amplification underpins the glucose-lowering and appetite-suppressing actions of GLP-1 receptor agonists and dual GIP/GLP-1 co-agonists.

Why It Matters

Understanding the incretin effect explains why medicines like semaglutide and tirzepatide are so effective for both diabetes and weight. NuLifeCare Singapore uses these incretin-based therapies as part of a comprehensive, medically supervised weight-management programme.