Learn
Understand peptides properly, from the first principle up
Five foundations written in plain English with a scientific tone. Read them in order for a complete grounding, or use them as reference while working through the directory.
Foundations
What Are Peptides?
A peptide is a short chain of amino acids. That single sentence hides a category that spans approved medicines, cosmetic ingredients, and unregulated online products.
Mechanism
How Peptides Work
Peptides mostly act as signals: they bind receptors and change cellular behaviour. Understanding receptor pharmacology explains most of what peptide medicines can and cannot do.
Systems
Peptide Biology
How the body makes, uses, and disposes of peptides — and why endogenous signalling systems constrain what external peptides can achieve.
Chemistry
Peptide Chemistry
Sequence, structure, synthesis, and purity — the physical properties that decide whether a peptide can become a medicine.
Evidence literacy
Peptide Research Basics
How to read peptide studies: study design hierarchies, phases of clinical development, and the language that signals uncertainty.
Editorial disclaimer
This site is educational and does not provide medical advice, dosing protocols, or treatment recommendations. Regulatory status and evidence strength differ sharply between compounds. A “research use only” label does not indicate that a product is appropriate for human use. Decisions about medicines belong with a qualified clinician.