Clinical Reference

The science of
GLP-1 drugs,
made legible.

Semaglutide, tirzepatide, Ozempic, Wegovy, Mounjaro — every mechanism explained, every side effect contextualized, every decision clarified. Peer-reviewed. Plainly written.

Peer-reviewed sources No sponsorships Free & open access Updated 2026
Doctor reviewing patient results
Featured Guide
How GLP-1 Agonists Work: Mechanism, Receptors & Weight Loss
A step-by-step walkthrough of incretin biology — from intestinal L-cells to hypothalamic satiety circuits.
Read the guide →
Essential Reading Start here
Medical research laboratory
Comparisons
Semaglutide vs Tirzepatide: Which Works Better for Weight Loss?
SURMOUNT-1 • STEP trials • Head-to-head evidence
 Person exercising outdoors
Side Effects
Managing Nausea and GI Side Effects on GLP-1 Medications
Dosing strategies • Dietary tips • When to call your doctor
 Healthy meal with vegetables and proteins
Diet & Nutrition
What to Eat on GLP-1 Medications: Foods That Work With the Drug
Protein targets • Managing nausea foods • Hydration
 Protein powder scoop and shaker bottle
Buyer's Guide
Best Protein Powder for GLP-1 & Ozempic Users (2026)
Isolate vs casein vs plant • Nausea-friendly picks • Daily plan
 Electrolyte powder and fiber supplement with water
Buyer's Guide
Best Electrolyte & Fiber Supplements for GLP-1 Users (2026)
Dehydration • Constipation • Product picks
All Guides 93 guides
See the complete index — all 182 guides, organized by topic →
Continuous Glucose Monitor Track your metabolic response in real time while on GLP-1 therapy
Shop Amazon →
How It Works
How GLP-1 Agonists Work: Mechanism, Receptors & Satiety
How It Works
GLP-1 and Insulin Resistance: How It Improves Type 2 Diabetes
How It Works
What Is "Food Noise" — and How GLP-1 Drugs Quiet It
How It Works
GLP-1 and the Brain: Reward Circuits, Dopamine & Addiction
How It Works
GLP-1 Drugs for Non-Diabetics: Off-Label Use & Evidence
How It Works
Foods That Naturally Boost Your Own GLP-1 Levels
How It Works
Relative vs. Absolute Risk: How to Read Any Trial Headline Number
Side Effects
Nausea on GLP-1: Why It Happens & How to Manage It
Side Effects
Practical Tips for Managing GLP-1 GI Side Effects
Side Effects
Hair Loss on GLP-1: Telogen Effluvium & Nutrient Deficiency
Side Effects
Muscle Loss on GLP-1 Medications: What the Evidence Says
Side Effects
Preserving Lean Mass on GLP-1: Protein, Resistance Training & Timing
Side Effects
"Ozempic Face" — What Causes It & Can You Prevent It?
Side Effects
Injection Technique & Site Rotation to Minimize Side Effects
Side Effects
GLP-1 and Alcohol: What You Need to Know
Side Effects
GLP-1 and Mental Health: Depression, Anxiety & Mood
Dosing
GLP-1 Dosing & Titration: A Complete Schedule Guide
Dosing
Breaking Through a Weight Loss Plateau on GLP-1
Dosing
Exercise Protocol on GLP-1: Resistance Training for Muscle Preservation
Dosing
GLP-1 and Sleep: Does Timing Your Dose Affect Sleep Quality?
Diet
Best Foods to Eat on Ozempic & Wegovy
Diet
Foods That Work With GLP-1 Drugs (and Foods to Avoid)
Diet
The Complete Nutrition Guide for GLP-1 Therapy
Diet
GLP-1 for Fatty Liver (NAFLD/MASH): Diet & Treatment
Diet
Best Protein Powder for GLP-1 & Ozempic Users (2026)
Diet
Best Electrolyte & Fiber Supplements for GLP-1 Users (2026)
Diet
GLP-1 Protein Tracker Printable: How to Track Protein on Ozempic & Wegovy
Cost & Access
GLP-1 Medications: Cost, Insurance Coverage & Access Guide
Cost & Access
How to Get Insurance to Cover GLP-1 Drugs (Prior Authorization Guide)
Cost & Access
Compounded Semaglutide vs Brand-Name Ozempic: Is It Safe?
Cost & Access
Best Telehealth Providers for GLP-1 Prescriptions (2026)
Comparisons
Semaglutide vs Tirzepatide: Head-to-Head Weight Loss Comparison
Comparisons
GLP-1 vs Metformin for PCOS: Weight, Insulin & Fertility
Comparisons
GLP-1 Drugs Compared: Cardiovascular Benefits by Medication
Comparisons
GLP-1 vs SGLT2 Inhibitors for Kidney Protection: What Trials Show
Comparisons
Wegovy vs Zepbound: Semaglutide vs Tirzepatide (2026)
Comparisons
Ozempic vs Mounjaro: Semaglutide vs Tirzepatide (2026)
Comparisons
Compounded Semaglutide vs Brand-Name: What to Know (2026)
Conditions
GLP-1 and Heart Disease: What the SELECT Trial Proved
Conditions
GLP-1 for Kidney Disease (CKD): FLOW Trial Results
Conditions
GLP-1 for Fatty Liver (MASH/NAFLD): Treatment Evidence
Conditions
GLP-1 and Alzheimer's: Neuroprotection & Cognitive Research
Conditions
GLP-1 for PCOS: Hormonal, Metabolic & Fertility Effects
Conditions
GLP-1 for Addiction: Alcohol, Smoking & Reward Circuitry
Conditions
GLP-1 and Binge Eating Disorder: What the Evidence Shows
Conditions
GLP-1 and Bone Density: Fracture Risk & What to Monitor
Conditions
How GLP-1 Drugs Reduce Alcohol Cravings
Conditions
GLP-1 and PCOS Fertility: Ovulation, Androgens & Insulin
Conditions
Resistance Training on GLP-1: A Protocol for Muscle Preservation
Conditions
GLP-1 Cardiovascular Outcomes: LEADER, SUSTAIN-6, SELECT Compared
Conditions
ESSENCE Trial: Semaglutide for MASH Liver Fibrosis (2024)
Buyer's guides

Before you buy, read the evidence.

Independent guides graded by what the trials show, including the categories we tell you to skip. Some links are affiliate links; see our affiliate disclosure.

Best CGM (Continuous Glucose Monitor) for GLP-1 Users Best Walking Pads & Under-Desk Treadmills for GLP-1 Users Best Home Blood Pressure Monitors for GLP-1 Users Best Protein Powder for GLP-1 & Ozempic Users Best Creatine for Muscle Preservation on GLP-1 Medications Best Wedge Pillows for Acid Reflux on GLP-1 Medications Best Vitamin D & Calcium Supplements for Bone Health on GLP-1 What to Keep Buying in the Maintenance Phase on a GLP-1 Best Holiday Cooking Tools for High-Protein Meals on a GLP-1 (2026) Best Zero-Proof Spirits & Mocktail Kits for Holiday Parties on a GLP-1 (2026) Best Cold-Weather & Thermal Layering Gear for GLP-1 Users Who Run Cold (2026) Best High-Protein Holiday Gift Boxes & Snack Gifts for GLP-1 Users (2026) Best Online GLP-1 Providers (2026) How to Get a GLP-1 Prescription Online Hims & Hers vs Ro GLP-1 Comparison Best GLP-1 Progress Journals (2027) Best GLP-1 Breakfast Tools (2027) Best GLP-1 Batch-Cooking Gear (2027) Best Body Measurement Tools (2027) LifeMD GLP-1 Weight Management Review (2026) Hims vs Ro vs LifeMD: GLP-1 Telehealth Comparison (2026)

The latest GLP-1 science,
in your inbox.

New clinical trials, protocol updates, and evidence summaries — distilled and delivered every week. No hype, no sponsorships.

A resource for your family
Scam calls targeting older adults are at record levels — the FBI logged $7.75 billion in reported losses from adults 60+ in 2025. Our free, no-signup guides show families exactly how the calls work — and the four rules that stop them.
Visit Scam-Proof Your Parents →
Losing weight? Don't lose muscle.
Up to 40% of GLP-1 weight loss can be muscle. The GLP-1 Protein Playbook shows you exactly how to protect it — with 25 high-protein meals that go down easy on a killed appetite.
Get the Playbook → $19

As an Amazon Associate, GLP-1 Explained earns from qualifying purchases made through links on this page. This does not affect the price you pay.