A research-backed peptide reference
Understand peptides through the lens of research.
Clear, evidence-based guides to 95+ peptides — what the science says, how they're studied, and what the research does and doesn't support. No hype.
A research-backed peptide reference
Clear, evidence-based guides to 95+ peptides — what the science says, how they're studied, and what the research does and doesn't support. No hype.
New to peptides?
Short, plain-English explainers before you dive into specific compounds.
Browse by research goal
Most peptides are researched for specific outcomes. Start with the area you're curious about.
Appetite regulation, fat metabolism, and glucose control.
22 guides · Semaglutide · Tirzepatide →Cellular repair, telomere health, and longevity pathways.
18 guides · GHK-Cu · Ipamorelin →Tissue repair, tendon/ligament healing, and gut health.
15 guides · BPC-157 · TB-500 →Growth-hormone secretagogues and IGF pathway compounds.
15 guides · TB-500 · Ipamorelin →Memory, focus, neuroprotection, and mood.
11 guides · Semax · Selank →Melanocortin-system peptides for libido and arousal.
14 guides · PT-141 · Melanotan II →Thymic peptides for immune modulation and resilience.
14 guides · Thymosin Alpha-1 · Thymalin →Collagen, pigmentation, and skin appearance.
8 guides · GHK-Cu · Melanotan II →Most researched
In-depth, fully referenced breakdowns of the peptides people ask about most.
A synthetic peptide fragment that has become one of the most studied “healing” peptides in animal research, though it has not completed human clinical trials.
Read the guide →A GLP-1 receptor agonist and one of the most clinically validated peptides in this encyclopedia — FDA-approved for type 2 diabetes and chronic weight management.
Read the guide →A first-in-class dual GIP and GLP-1 receptor agonist that produced some of the largest weight-loss results recorded in obesity trials.
Read the guide →An investigational “triple agonist” (GIP, GLP-1, and glucagon receptors) that produced some of the largest weight reductions yet seen in early obesity trials.
Read the guide →A naturally occurring copper-binding tripeptide that declines with age and is widely used in cosmetic skincare for its collagen and skin-repair signaling.
Read the guide →A synthetic peptide related to Thymosin Beta-4, an actin-binding protein involved in cell migration and tissue repair.
Read the guide →A selective growth-hormone secretagogue (a ghrelin-receptor agonist) studied for stimulating the body's own GH release with relatively few off-target effects.
Read the guide →A melanocortin receptor agonist and, as bremelanotide (Vyleesi), an FDA-approved treatment for hypoactive sexual desire disorder in premenopausal women.
Read the guide →Head-to-head
Cross-shopping two peptides? Start with a neutral, side-by-side breakdown.
Semaglutide (Ozempic, Wegovy) vs tirzepatide (Mounjaro, Zepbound): how the two weight-loss drugs differ in mechanism, trial weight loss, and side effects.
See comparison →Tirzepatide (Mounjaro) vs retatrutide: dual vs triple incretin agonist, trial weight loss, and approval status compared.
See comparison →Semaglutide (Ozempic, Wegovy) vs liraglutide (Victoza, Saxenda): weekly vs daily GLP-1, weight-loss results, and dosing compared.
See comparison →Semaglutide (Ozempic, Wegovy) vs retatrutide: single GLP-1 vs triple agonist, weight-loss data, and approval status.
See comparison →BPC-157 vs TB-500: how the two popular 'healing' research peptides differ in origin, mechanism, and evidence — and what they share.
See comparison →Ipamorelin vs CJC-1295: GHRP vs GHRH analog, how they differ, and why they're often combined for growth-hormone release.
See comparison →