Peptide education

Peptide pages with citations, FDA and compounding status, study conditions, and product-quality warnings for common online claims.

alpha-helix model
Representationball & stick
Drag to rotate · click an atom · scroll to zoom
Residues15 AA
CompositionBody Protection Compound 157
Carbon62Hydrogen98Nitrogen16Oxygen22

A 15-residue chain of 15 amino acids. Select any atom in the model to inspect its element, residue, and structural role.

Primary sequence · N -> CGEPPPGKPADDAGLV
01Gly
02Glu
03Pro
04Pro
05Pro
06Gly
07Lys
08Pro
09Ala
10Asp
11Asp
12Ala
13Gly
14Leu
15Val
Proline residue (4) - backbone rigidityRead N-terminus to C-terminus, left to right
Molecular formulaC62H98N16O22
Molar mass1419.56 g/mol
Isoelectric point~ 4.9 pI

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Peptides

Open a peptide page to see human evidence, FDA or compounding status, routes and regimens from source material, and known product-quality warnings.
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AStrong human evidence
Semaglutide
GLP-1 receptor agonist peptide drug

The active ingredient behind Ozempic, Wegovy, and Rybelsus, useful for separating product-specific label evidence from compounded or research-use claims.

Approved for specific use
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AStrong human evidence
Tirzepatide
Dual GIP and GLP-1 receptor agonist peptide drug

The active ingredient in Mounjaro and Zepbound, with strong product-specific evidence for type 2 diabetes, chronic weight management, and OSA in adults with obesity.

Approved for specific use
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BModerate human evidence
Retatrutide
investigational GIP, GLP-1, and glucagon receptor agonist

An investigational once-weekly triple agonist peptide with strong human weight-loss and glycemic-control signals, unresolved approval status, and high gray-market product-quality risk.

Investigational / not approved
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BModerate human evidence
Cagrilintide
investigational long-acting amylin analogue peptide

An investigational long-acting amylin analogue with controlled human weight-management evidence and clear FDA limits around compounding and online product claims.

Investigational / not approved
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BStrong human evidence
CagriSema
investigational amylin analogue plus GLP-1 receptor agonist combination

Novo Nordisk's investigational cagrilintide-plus-semaglutide program, with phase 3 human weight-management evidence and separate risks for compounded or online combinations.

Investigational / not approved
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DLimited human evidence
Cartalax
Cartilage-oriented tripeptide

A cartilage-oriented tripeptide where preclinical chondrocyte support, weak legacy symptom reports, and product-identity drift need to be kept separate.

Varies by product and jurisdiction
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Foundations

Short explainers on animal studies, human trials, FDA status, compounding, and product-quality risk.
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What changed

FDA actions, label changes, and source updates that affect peptide claims and evidence pages.
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