Certificate of Analysis for each lotFast shipping from FranceLivraison offerte dès €125.00Get off your first order of €70.00 or more
PeptidAs®L'As des peptides

Blog

Guides and reference points on reconstitution, storage and reading certificates of analysis, for research use only.

What Is a Peptide? Definition, Structure, and Use in Research

A peptide is a short chain of amino acids linked by peptide bonds. Understanding its structure, how it differs from a protein, and its lyophilized form is the starting point for any serious research.

Équipe scientifique PeptidAs5 September 2026 · 6 min

What Is Retatrutide? An Explanation of the Triple Agonist

Retatrutide is the first peptide to simultaneously activate three metabolic receptors. This is what sets it apart from tirzepatide and semaglutide, and this is what the published literature actually reports.

Équipe scientifique PeptidAs4 September 2026 · 5 min

What Is GHK-Cu? An Explanation of the Copper Tripeptide

Discovered in human plasma in 1973, GHK-Cu is one of the most extensively studied peptides in skin research. Its structure, its complex with copper, and what the literature actually says.

Équipe scientifique PeptidAs3 September 2026 · 4 min

How to Reconstitute a Lyophilized Peptide in the Laboratory

Dissolving a lyophilized peptide is the step where the most batches are lost. Choosing the solvent, calculating the concentration, proper procedures, and mistakes that ruin a vial.

Équipe scientifique PeptidAs2 September 2026 · 6 min

How to Read a Peptide Analysis Certificate

A certificate of analysis is not a sales pitch; it is experimental data. Here's how to interpret each section—and how to spot a document that proves nothing.

Équipe scientifique PeptidAs1 September 2026 · 6 min