The Science Behind GLP-1

8 min read·Updated May 2026

What Is GLP-1? A Plain-Language Guide to How These Medications Work

GLP-1 stands for glucagon-like peptide-1 — a hormone your gut produces naturally after every meal. Understanding what it does, and how medications mimic it, explains almost everything about why these drugs work.

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27 more in GLP-1 Science

Sleep Quality on Semaglutide: What Patients Report

Better sleep is among the most-reported quality-of-life changes on semaglutide. Some of it is weight-mediated; some of it appears to be direct.

Foods to Avoid on GLP-1 Medications (and Why They Trigger Side Effects)

Slowed gastric emptying makes some foods feel worse than others. The list isn't long, but it's specific.

Not Losing Weight on Ozempic? 7 Reasons and What to Try

STEP 1 average: 14.9% loss at 68 weeks. But the range was wide — some lost over 25%, some less than 5%. Here are the most common explanations for being on the lower end of that distribution.

GLP-1 Side Effects Timeline: Week-by-Week What to Expect

Most side effects cluster in the first 4–8 weeks and improve as the body adapts. Knowing the timing — what tends to peak when, what tends to resolve when — changes the experience of going through it.

Building a High-Protein Meal Plan While on a GLP-1

Reduced appetite makes hitting protein targets harder. A practical framework: density over volume, simple repeatable meals, and protein-first sequencing.

GLP-1 Maintenance Dosing: What Long-Term Use Looks Like

Most patients on semaglutide for obesity reach the 2.4 mg maintenance dose. What that looks like at two years, what dose-reduction options exist, and what STEP 5 revealed about the second year of treatment.

How to Stop a GLP-1 Without Regaining the Weight: An Evidence Review

STEP 4 and SURMOUNT-4 are clear about what discontinuation looks like at the population level. But individual outcomes vary, and the available data offer modest guidance on what shifts the curve.

How GLP-1 Medications Affect Emotional Eating: What Patients Report

Beyond hunger reduction, semaglutide and tirzepatide users describe something specific: emotional eating loses its pull. Here's what the trials measured and what the mechanism likely is.

GLP-1 Medications and Alcohol: What Science Actually Says

Patients on semaglutide consistently report they want alcohol less. The mechanism likely overlaps with food reward — and a clinical trial in alcohol use disorder is underway.