The identity line on a certificate says a mass was observed and matched. That is a real check and a narrow one. This post covers what mass spectrometry proves, the sequences it cannot distinguish, and why identity and purity are separate claims.
Read the post →
GHK-Cu is a three-residue peptide bound to a copper ion, and the copper is not an additive. This post covers what the complex is, why the metal is integral to how it is studied, what the published work actually reports, and the handling consequences copper brings to an assay.
Read the post →
MOTS-c and humanin are encoded inside the mitochondrial genome rather than the nuclear one, which makes them a distinct class. This post covers where they come from, why that origin matters, what the published work reports, and how they differ from the other longevity compounds.
Read the post →
A certificate reporting 99% purity is not telling you how much peptide is in the vial. Purity is a ratio, net peptide content is a mass, and the gap between them is counter-ion and water. Here is what each number means and why only one of them belongs in your dilution.
Read the post →
Five melanocortin receptors, one family of analogues, and the selectivity that separates them. This post covers what MC1R through MC5R do, why melanotan-2 is non-selective, how PT-141 relates, and what that means for attributing an effect.
Read the post →
The purity figure on a certificate comes from a chromatogram, and the trace tells you more than the number does. This post covers what the axes mean, what the shoulders and late peaks represent, why the wavelength matters, and what a good trace looks like.
Read the post →
Larger vials cost less per milligram and open sooner. This post works through the real trade — unit cost against the stability clock that starts at reconstitution — with the per-milligram maths for every size in the catalogue.
Read the post →
Bacteriostatic water is the default, not the only answer. This post covers when plain sterile water is correct, when a buffer is needed, what to do with a peptide that will not dissolve, and why the choice belongs in your methods section.
Read the post →
Amylin is the other hormone pancreatic beta cells secrete, and its analogues act through a different receptor family than the GLP-1 drugs. This post covers what amylin is, what cagrilintide changes, why the two classes are studied together, and what the published combination trials actually reported.
Read the post →
Peptide sequences are written in two notations and certificates use both. This post gives the full amino acid table, explains what the N and C termini mean, how to read modifications like Ac- and -NH2, and how to check a sequence against a stated molecular weight yourself.
Read the post →
Two 5 mg vials can hold twice as many molecules as each other. This post explains why receptor work needs molar concentration rather than mass, how to convert a vial to nanomoles and micromolar, and a table of molar amounts for every vial size in the catalogue.
Read the post →
Once a lyophilized vial is reconstituted the clock starts. This post covers what actually degrades a peptide in solution, why the answer depends on the sequence rather than the label, what bacteriostatic water does and does not protect against, and how to decide a working window for your own material.
Read the post →The blog covers buying, handling and research-design questions as they come up. The evergreen material lives in the guides: reconstitution, reading a certificate of analysis, storage and stability, one research guide per compound and the glossary.
New posts publish to the RSS feed. Every post is written for laboratory research use only and links to the lot certificate for any product it mentions.
One email when a new certificate is published, when a sold-out compound is back, or when a new compound is added. About twice a month, nothing else.
All products are sold for laboratory research use only. They are not drugs, foods, supplements or cosmetics, are not approved by the FDA, and are not intended to diagnose, treat, cure or prevent any disease, or for human or animal use. To continue, confirm that you are a qualified researcher or laboratory purchaser aged 21 or over.
Exit Your confirmation is stored for this browser session only. Terms of saleEnter your email and the code lands in your inbox, along with restock alerts and the certificate for every new lot before it is listed.
WELCOME15Applied at checkout on orders over $100. One per researcher.