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The world's go-to source on peptides.

Take our free 60-second assessment and we'll match you with the peptide categories most relevant to your goals — no account required to start. Or go straight to the research on every compound we document.

Most studied
5,447Semaglutide
Least studied
2Matrixyl

Published papers on PubMed. Both are in this catalogue.

The evidence landscape

Not every peptide is equally studied.

Semaglutide has 5,447 published papers. Matrixyl has 2. Both are in this catalogue.

Each dot is a compound we document, placed by how many papers PubMed returns for it. The scale is logarithmic — every step to the right is ten times more published research.

Published research per peptide, on a logarithmic scale21 compounds ranging from 2 papers for Matrixyl (Palmitoyl Pentapeptide-4) to 5,447 papers for Semaglutide. The full figures are listed in the table below this chart.Matrixyl (Palmitoyl Pentapeptide-4) · 2Melanotan I (Afamelanotide) · 3Argireline (Acetyl Hexapeptide-8) · 21AOD-9604 · 23CJC-1295 · 32Ipamorelin · 53Epithalon · 56Selank · 68GHK-Cu · 93PT-141 (Bremelanotide) · 109MK-677 · 137Retatrutide · 160Semax · 206BPC-157 · 224Melanotan II · 243Sermorelin · 331Cerebrolysin · 661Thymosin Alpha-1 · 864TB-500 · 1,045Tirzepatide · 2,366Semaglutide · 5,447
FDA-approved drugResearch-use compound21 compounds · counts refreshed August 2, 2026
View all 21 figures as a table
Published paper counts on PubMed for every compound documented on A Peptide Store, highest first.
CompoundStatusPublished papers
SemaglutideFDA-approved drug5,447
TirzepatideFDA-approved drug2,366
TB-500Research use1,045
Thymosin Alpha-1Research use864
CerebrolysinResearch use661
SermorelinResearch use331
Melanotan IIResearch use243
BPC-157Research use224
SemaxResearch use206
RetatrutideResearch use160
MK-677Research use137
PT-141 (Bremelanotide)Research use109
GHK-CuResearch use93
SelankResearch use68
EpithalonResearch use56
IpamorelinResearch use53
CJC-1295Research use32
AOD-9604Research use23
Argireline (Acetyl Hexapeptide-8)Research use21
Melanotan I (Afamelanotide)Research use3
Matrixyl (Palmitoyl Pentapeptide-4)Research use2

A paper count measures how much has been published, not whether something works. A compound on the right has been studied more, not proven safer. Read what the research actually says.

7

Categories covered

21

Peptides documented

0

Verified suppliers

02

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    Reviewed on a rolling basis

    Every category page is checked against current research and regulatory guidance so you're never reading last year's information.

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Recently verified suppliers

Identity confirmed and certificates of analysis on file. Each supplier's verification score shows exactly what we checked — and what we don't track.

No supplier has completed verification yet. When one does, it appears here — with the checks it passed listed in full.

The score counts what we have actually confirmed — identity, certificates of analysis, and how recent they are. It is not a rating of product quality, and a low number means we have verified less, not that a supplier is worse.

05

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