Peptide research, explained.
Practical guides on quality, testing and storage, plus neutral overviews of the published research behind each compound. Written to help researchers make informed decisions about the materials they work with.
What Is a Peptide? Amino Acids, Bonds and Sequences
A plain-language introduction to peptides: amino acids, the peptide bond, which way a sequence reads, and how peptides differ from proteins.
Research BasicsHow Peptides Are Made: Solid-Phase Synthesis and Purification
How most research peptides are built on a resin, cleaved and purified, and why every batch contains small amounts of by-products.
Quality & TestingCommon Peptide Impurities and Degradation Pathways
Where impurities in a peptide come from: the synthesis itself, and slow chemical changes over time. And how each shows up on a report.
Quality & TestingWhat “Third-Party Tested” Actually Means
What independent testing is, what makes it meaningful, and the limits worth knowing, including who chooses the sample.
Research BasicsWhy One Compound Has Several Names (and How to Be Sure You Have the Right One)
Why research compounds go by several names, why different forms of the same compound are different substances, and how to confirm identity.
Research BasicsHow to Read a Peptide Sequence: Codes, Ends and Molecular Weight
One-letter and three-letter codes, modified ends, and a worked example that calculates the molecular weight of Semax from its sequence.
Compound ProfilesSelank: A Research Overview
Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) that is an analog of the immune peptide tuftsin.
Compound ProfilesEpitalon: A Research Overview
Epitalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) designed from the amino acid composition of epithalamin, a polypeptide extract of bovine pineal gland.
Compound ProfilesGlutathione: A Research Overview
Glutathione is a tripeptide of glutamate, cysteine and glycine.
Compound ProfilesKPV: A Research Overview
KPV is a tripeptide (Lys-Pro-Val) that corresponds to the C-terminal fragment, residues 11 to 13, of α-melanocyte-stimulating hormone (α-MSH).
Quality & TestingHow to Read a Certificate of Analysis (COA) for Research Peptides
A line-by-line checklist for a third-party test report: batch number, lab, methods, purity, identity, and what a COA does not cover.
Quality & TestingHow Peptide Purity Is Tested: HPLC and Mass Spectrometry Explained
The two lab methods behind most peptide COAs, in plain language: what each one measures and what it cannot tell you.
Quality & TestingPurity vs Quantity: What “99% Purity” Does and Doesn’t Mean
Why a high purity percentage is not the same as the weight of peptide in the vial, and what to ask about quantity.
Quality & TestingPeptide Testing Glossary: Terms You’ll See on a COA
Plain-language definitions of the terms on a peptide certificate of analysis, from batch number to net peptide content.
Research BasicsHow to Evaluate a Research Peptide Supplier: A Checklist
What separates a trustworthy supplier from a risky one: verifiable testing, transparency, responsible conduct, and the red flags to walk away from.
Research BasicsWhat Is a Lyophilized Peptide? Freeze-Drying and Cold-Chain Shipping
What lyophilization is, why research peptides are supplied as freeze-dried powder, and why cold-chain shipping matters.
Handling & StorageHow to Store Lyophilized Research Peptides
Cold, dry, dark and sealed: how to keep freeze-dried peptide vials in good condition, and the signs that something has gone wrong.
Compound ProfilesBPC-157: A Research Overview
BPC-157 is a synthetic peptide of 15 amino acids whose sequence is a fragment of a protein found in human gastric juice.
Compound ProfilesGHK-Cu: A Research Overview
GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine (GHK).
Compound ProfilesNAD+: A Research Overview
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found widely in nature.
Compound ProfilesSemax: A Research Overview
Semax is a synthetic heptapeptide (Met-Glu-His-Phe-Pro-Gly-Pro) that is an analog of the ACTH(4–10) fragment of adrenocorticotropic hormone.
Compound ProfilesMOTS-c: A Research Overview
MOTS-c (mitochondrial open reading frame of the 12S rRNA-c) is a 16-amino-acid peptide encoded in the mitochondrial genome, in the MT-RNR1 gene.
All products are sold strictly for laboratory research use. For laboratory research use only. Not for human or veterinary use. See our Research Use Only page.