PeptideFox
FoxAI
AboutArticlesPeptide LibraryCalculatorSupportPrivacy

© 2026 PeptideFox. For research and educational purposes only.

    GLP-1s

    Semaglutide, tirzepatide, and retatrutide are three different receptor strategies — not three doses of the same drug. Each one answers the same question about hunger, fat, and lean mass in a different way.

    Ask FoxAIPeptide research chat backed by the PeptideFox knowledge graph and peer-reviewed papers.

    Three compounds, three receptor strategies. Semaglutide activates GLP-1 alone — SELECT showed a 20% cardiovascular event reduction in obesity with established heart disease. Tirzepatide adds GIP and delivered 47% more weight loss than semaglutide in the head-to-head SURMOUNT-5 trial. Retatrutide adds glucagon on top, pushing the weight-loss ceiling higher and mobilizing liver fat directly, though it remains investigational. Pick by the outcome you need, not the headline number.

    Compare GLP-1 Compounds

    The receptor pharmacology dictates the fat-vs-lean outcome, the side-effect pattern, and what happens when you stop — compare the three before picking.

    Open tool

    Browse other categories:PeptidesProtocolsGuides

    Compound Guides

    SemaglutideOzempic•Wegovy

    Semaglutide dosing ranges from 0.25mg to 2.4mg a week. How much weight loss to expect by dose, side effects during titration, and if Ozempic or Wegovy is right for you.

    Read guide→

    TirzepatideMounjaro•Zepbound

    Tirzepatide dosing ranges from 2.5mg to 15mg. Explore trial data for weight loss, side effects vs. semaglutide, and if Mounjaro or Zepbound makes sense for you.

    Read guide→

    Deep Dives

    Retatrutide vs TirzepatideSame Receptors, Different Drug

    Retatrutide and tirzepatide are not stronger/weaker versions of the same drug. Tirz is the steadier default; reta adds glucagon, liver-fat leverage, and much higher titration risk.

    Read guide→

    GLP-1 FatigueWhy It Happens and What Helps

    GLP-1 fatigue explained: why semaglutide, tirzepatide, and retatrutide cause tiredness, which compound causes more, and evidence-based fixes from protein to mitochondrial support.

    Read guide→

    GLP-1s and Cholesterol

    GLP-1 drugs also improve lipid panels—lowering triglycerides, shifting LDL, and reducing liver fat. Trial data for semaglutide, tirzepatide, and retatrutide.

    Read guide→

    Oral GLP-1 OptionsWegovy Pill•Orforglipron

    There's now a pill version of semaglutide, and orforglipron is coming. How they compare on weight loss, side effects, and cost — and if its right for you.

    Read guide→

    Support Stacks for GLP-1sPreserving Lean Mass

    GLP-1 body composition explained: semaglutide, tirzepatide, and retatrutide lean-mass data, why muscle loss happens, and how to protect strength during weight loss.

    Read guide→

    Protocols

    NAD+ for RetatrutideCritical Support Layer for GLP-1s

    Retatrutide raises fat-oxidation demand. NAD+ supports beta-oxidation, energy stability, and fatigue resilience during a structured retatrutide protocol.

    Read guide→

    NAD+ and MOTS-c for EnergyThe Two-Compound Mito Stack

    The NAD+ and MOTS-c stack supports the cellular adaptation loop that metabolic stress, GLP-1 use, and age can strain. Full protocol with dosing breakdowns and a 12-week timeline.

    Read guide→

    Retatrutide: Advanced StackDual-Axis Protocol to Protect Lean Mass

    An advanced retatrutide recomp protocol using NAD+, MOTS-c, L-Carnitine, and Tesamorelin to support fat oxidation, training output, and lean-mass preservation.

    Read guide→