Peptide Guides
Educational guides explaining what different peptides are and how they work.
Showing 36 guides
Are Peptides Safe?
An honest overview of peptide safety, distinguishing between approved medications and research compounds.
How Do GLP-1 Agonists Work?
A clear explanation of how GLP-1 receptor agonists produce their effects on metabolism and appetite.
How Do Peptides Work?
An introduction to how peptides function in the body, including receptor binding, signaling, and why structure matters.
How to Read Peptide Research
A practical guide to evaluating peptide research claims and understanding what studies actually show.
Peptide Clinical Trial Phases
Understanding the phases of clinical trials and what each stage tells us about a peptide's development.
Peptide Evidence Levels Explained
Understanding how we evaluate and grade the evidence behind peptide claims at PepCodex.
Peptide vs Protein: What's the Difference?
Understanding the difference between peptides and proteins, and why it matters for medications and supplements.
What Are GH Secretagogues?
An introduction to growth hormone secretagogues, compounds that stimulate the body to release growth hormone.
What Are GLP-1 Agonists?
An introduction to the GLP-1 agonist class of medications for diabetes and weight management.
What Are Longevity Peptides?
An introduction to peptides marketed for anti-aging and longevity, including Epitalon and thymic peptides.
What Are Nootropic Peptides?
An introduction to peptides marketed for cognitive enhancement, including Semax, Selank, and Dihexa.
What Are Recovery Peptides?
An introduction to peptides marketed for tissue repair and recovery, including BPC-157 and TB-500.
What is BPC-157?
An introduction to BPC-157, its origins, claims, and important limitations.
What is CJC-1295?
An introduction to CJC-1295, a modified GHRH analog designed for longer-lasting effects.
What is Dihexa?
An introduction to dihexa, an experimental nootropic peptide studied for cognitive effects.
What is Epithalon?
An introduction to epithalon, a synthetic tetrapeptide studied for potential effects on telomeres.
What is GHK-Cu?
An introduction to GHK-Cu (copper peptide), the naturally occurring peptide used in skincare.
What is Humanin?
An introduction to humanin, a naturally occurring mitochondrial-derived peptide with protective properties.
What is Ipamorelin?
An introduction to ipamorelin, a selective growth hormone secretagogue that was never approved.
What is LL-37?
An introduction to LL-37, a human antimicrobial peptide with emerging research on immune function.
What is Melanotan II?
An introduction to Melanotan II, the unapproved tanning peptide with serious safety warnings.
What is MK-677?
An introduction to MK-677, an oral growth hormone secretagogue that was never approved.
What is Mounjaro?
An introduction to Mounjaro, the brand name for tirzepatide approved for type 2 diabetes.
What is Ozempic?
An introduction to Ozempic, the brand name for semaglutide approved for type 2 diabetes.
What is PT-141?
An introduction to PT-141 (bremelanotide/Vyleesi), the FDA-approved treatment for HSDD.
What is Retatrutide?
An introduction to retatrutide, the investigational triple agonist showing promising weight loss results.
What is Rybelsus?
An introduction to Rybelsus, the oral tablet form of semaglutide for type 2 diabetes.
What is Semaglutide?
An introduction to semaglutide, the GLP-1 agonist behind Ozempic and Wegovy.
What is Sermorelin?
An introduction to sermorelin, a GHRH analog that was once FDA-approved for pediatric growth hormone deficiency.
What is TB-500?
An introduction to TB-500, a fragment of thymosin beta-4 marketed for tissue repair.
What is Tesamorelin?
An introduction to tesamorelin (Egrifta), the FDA-approved GHRH analog for HIV lipodystrophy.
What is Thymalin?
An introduction to thymalin, a thymic peptide extract studied for immune function.
What is Tirzepatide?
An introduction to tirzepatide, a dual GIP/GLP-1 receptor agonist used for type 2 diabetes and weight management. Learn how it works, what the research shows, and key facts you should know.
What is Wegovy?
An introduction to Wegovy, the brand name for semaglutide approved for weight management.
What is Zepbound?
An introduction to Zepbound, the brand name for tirzepatide approved for weight management.
Why Animal Studies Aren't Enough
Understanding why promising rodent research often fails to translate to human benefits.