01 · mechanism of action
Tirzepatide is a dual GLP-1 / GIP receptor agonist developed by Eli Lilly that showed extraordinary metabolic effects in preclinical and clinical studies. In animal studies on obese mice and rats it produced weight reductions of 25–40 % of baseline weight — significantly stronger than pure GLP-1 agonists. The GIP component enhances glucose-dependent insulin secretion and improves insulin sensitivity through direct action on adipocytes. SURPASS clinical studies (2021–2023) in type-2 diabetics achieved mean weight reductions up to 22 % and HbA1c reductions of 2.5 percentage points. In NASH animal models tirzepatide significantly reduced liver fat content, inflammatory markers and fibrotic changes.
