The Peptide Papers

The Peptide Papers

What the studies say about peptides, in plain language.

One guide per compound. Each claim links to the published study it came from, and every guide ends with what the researchers flagged.

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Terms

This page explains what published studies found. That is all it is. It is not medical advice, and it is not instructions for using anything. Nothing here is meant to find, treat, cure or stop any illness. The compounds discussed on this site are not approved medicines in the EU or the UK. Research compounds are sold for laboratory use only, not for use in humans or animals. A study tells you what happened to the people in it. It does not tell you what would happen to you. Talk to a doctor. This page is published by AuraVia Research Ltd, which sells research compounds.

By submitting the form you agree to receive one study breakdown email a week from The Peptide Papers. You can unsubscribe with one click in any email. Your first name and email address are stored with Brevo, our email provider, until you unsubscribe. Privacy notice.

The guides

What the study looked at, what it found, and what the researchers flagged. Nothing else.

GHK-Cu

GHK-Cu pen: injectable vs topical, what studies tested

What a pre-filled GHK-Cu pen is, why almost every human study of the copper peptide used creams and gels, and what that means when reading claims about injections.

6 min read Retatrutide

Retatrutide pen: what's inside and what the label means

A plain guide to the pre-filled retatrutide pen: what 15 mg or 40 mg on the label means, how a pen differs from a vial, and what the lab test of a pen batch found.

7 min read Retatrutide

Retatrutide side effects: what the trials reported

Every side effect reported in the published retatrutide trials, with the percentages: nausea, diarrhoea, heart rate, skin sensations, low blood pressure and dropouts.

7 min read Retatrutide

Retatrutide vs tirzepatide vs semaglutide: trial results

Retatrutide, tirzepatide and semaglutide side by side: how each works, the weight results of their main trials, side effects, and why the numbers are not directly comparable.

8 min read Retatrutide

What is GLP-3? The retatrutide nickname explained

There is no hormone called GLP-3. The name is an online nickname for retatrutide, the triple agonist. Here is where it comes from and what the trials of retatrutide found.

5 min read Research peptides

Where to buy peptides in Europe: 9 checks before ordering

How to judge a research peptide supplier in Europe: verifiable lab reports, batch numbers, identity tests, shipping inside the EU, payment, refunds and honest labelling.

7 min read BPC-157

BPC-157: what the studies say (animal and human data)

What published studies found about the pentadecapeptide BPC-157: rodent tendon, gut and blood-vessel work, the tiny human studies, and what reviewers flag.

8 min read GHK-Cu

GHK-Cu: what the studies say about the copper peptide

What published studies found about the copper peptide GHK-Cu: cell and animal work, gene analyses, the few human trials, and what remains unproven.

8 min read Pens and vials

Peptide pen or vial? What changes between the two

A neutral explainer of lyophilised vials with bacteriostatic water versus pre-filled pens: stability, handling, arithmetic and dose consistency.

7 min read Retatrutide

Retatrutide: what the studies say, 2026 trial results

What the published retatrutide trials found in the people studied: weight, blood sugar, liver fat, side effects, and where it stands with regulators.

8 min read TB-500

TB-500 (thymosin beta-4): what the studies say

What studies found about thymosin beta-4 and the fragment sold as TB-500: wound, heart and eye studies, the horse-racing doping context, and the limits.

8 min read BPC-157 + TB-500

Wolverine stack (BPC-157 + TB-500): what studies say

Why BPC-157 and TB-500 are studied together, what the one animal study of the pair found, what each showed alone, and why human trials are missing.

7 min read Lab reports Draft

How to read a Janoshik report

What a certificate of analysis from Janoshik contains, how to verify one with its key, and the four public reports behind the products named on this site.

3 min read

Free tools

Small helpers for reading research and lab reports. None of them gives advice.

Reconstitution calculator

Vial content and water volume in, concentration out.

Open the tool

Pen or vial?

Four questions, then a neutral explanation of what each format changes.

Open the tool

Verify a lab report

What a Janoshik certificate contains and how to check it with its key.

Open the tool

Price per milligram

Compare offers by the amount of compound, not by the size of the box.

Open the tool

One study breakdown a week

Every week, one published study explained in plain language, with its citation. Unsubscribe in one click.

Terms

This page explains what published studies found. That is all it is. It is not medical advice, and it is not instructions for using anything. Nothing here is meant to find, treat, cure or stop any illness. The compounds discussed on this site are not approved medicines in the EU or the UK. Research compounds are sold for laboratory use only, not for use in humans or animals. A study tells you what happened to the people in it. It does not tell you what would happen to you. Talk to a doctor. This page is published by AuraVia Research Ltd, which sells research compounds.

By submitting the form you agree to receive one study breakdown email a week from The Peptide Papers. You can unsubscribe with one click in any email. Your first name and email address are stored with Brevo, our email provider, until you unsubscribe. Privacy notice.