GLP-1s Explained: How Semaglutide & Tirzepatide Actually Work
A clear, physician-reviewed primer on the incretin-mimetic medications reshaping modern weight management.
What is a GLP-1?
GLP-1 (glucagon-like peptide-1) is a naturally occurring hormone released by your gut after meals. It slows gastric emptying, signals satiety to the brain, and helps regulate blood sugar. Medications like semaglutide and tirzepatide mimic these signals with a much longer half-life.
Semaglutide vs. tirzepatide
Semaglutide is a single GLP-1 agonist. Tirzepatide is a dual GIP/GLP-1 agonist — it activates two incretin pathways, which is why trials show more pronounced appetite suppression and weight loss for many patients.
What to expect
Most protocols start low and titrate weekly to minimize GI side effects. Under physician supervision, patients typically see meaningful changes in appetite within the first 2–4 weeks. Lifestyle work — protein intake, resistance training, sleep — remains essential.
Is it right for you?
GLP-1s are powerful tools, not shortcuts. A licensed physician will review your history, current medications, and goals before recommending a protocol. Individual results vary.
