WhichPepsPeptides. Without the hype.
Learn

Start with the concepts. Then follow the evidence.

WhichPeps is designed for beginners and experienced researchers. This section explains the vocabulary and evidence rules before you enter the detailed compound library.

Read at the level that suits you

You do not need a science background. WhichPeps gives the simple answer first, then lets you open the evidence and technical detail only when you want it.

New to the subject

Start with plain-English summaries, Peptides 101 and the glossary. Scientific terms are explained rather than assumed.

Want the evidence

Open outcome cards and study records to see who was studied, what happened, and what limits the conclusion.

Research / technical

Go deeper into mechanism, route, identifiers, regulatory context, provenance and primary sources.

One evidence system, different ways in

Learn explains the concepts. Research takes you into compound profiles, studies and comparisons. Intelligence explains the structured evidence system used underneath the public website. They are not separate scientific databases.

Start here

Peptides 101

What peptides are, what they are not, and why the label alone tells you nothing about approval, effectiveness or safety.

Open →Includes vials, pens, BAC water, brands, product quality and red flags.Evidence literacy

Understanding the Evidence

How to separate laboratory, animal and human evidence; read endpoints; recognise uncertainty; and avoid mechanism-to-benefit mistakes.

Open →Dictionary

Peptide & Research Glossary

Search plain-English definitions with technical context and why each term matters when reading WhichPeps.

Open →History

History of Peptide Science & Medicines

A sourced timeline from foundational peptide science and insulin to modern analogues and multi-agonist research.

Open →Regulation

Regulation & Approval Status

Approved, investigational, off-label, unlicensed and research-only language, with UK, EU and US context.

Open →Identity

Names, Aliases, Brands & Research Codes

Why Mounjaro, a development code, an online nickname and a misspelling can all point to one canonical entity without becoming duplicate evidence.

Open →

Explore further

How Peptides Work

Receptors, signalling, route, formulation and half-life — explained without turning mechanism into treatment advice.

Open →

Types of Peptides & Related Compounds

A practical navigation taxonomy that makes peptide analogues, hormones, proteins, small molecules and mixtures explicit.

Open →

Frequently Asked Questions

Common beginner questions answered from the evidence/methodology, without supplier or dosing guidance.

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Testing, COAs & Product Quality

What identity, purity, assay/content, sterility, endotoxin and stability testing can — and cannot — establish.

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Already know what you are looking for?

Search by canonical name, brand, research code, common shorthand or recognised spelling variant. WhichPeps resolves those terms to one canonical evidence page wherever possible.

Search compoundsHow evidence is assessed