Every vial on this site carries the phrase, and it is a statement about regulatory status rather than a disclaimer. This post covers what RUO designates, what it does not certify, why the label appears on the vial as well as the page, and what it asks of a buyer.
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The gap between clicking order and opening a box is where lot traceability is either preserved or lost. This post covers how a lot is picked, what should be in the package, what to check on arrival, and what to do when something is wrong.
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Modified GRF (1-29), CJC-1295 no-DAC and Mod GRF are the same molecule. This post explains where research codes, INN names, sequence descriptions and brand names come from, and how to pin down which compound a supplier is actually selling.
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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.
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Lyophilized peptides are routinely shipped at ambient temperature, and the science says that is fine. This post explains why the dry state is stable, what actually threatens a vial in transit, when cold shipping is genuinely warranted, and what to do with a package that arrived warm.
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A 5 mg vial of lyophilized peptide holds a few milligrams of powder, often a thin film or a small cake you can barely see. That is normal. Here is what freeze-drying leaves behind, what a good vial looks like, the appearances that are fine, the ones that are not, and what to do before you open it.
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The same compound can cost half as much from one supplier as another. Sequence length, purification passes, net peptide content, per-lot testing and fill accuracy explain most of the gap. Here is where each shows up on the certificate, with a worked price-per-net-milligram comparison.
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Research peptides are sold in the US as laboratory chemicals, not as drugs. The line is intended use: a peptide sold and used for research is regulated differently from the same peptide sold or used for human treatment. Here is how the FDA framework works, what changed in 2026, what the 2026 warning letters say, and what it means for a buyer.
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98% purity by HPLC is enough for most in-vitro work and is the floor for cell assays and animal models. Below it, the missing percent is usually truncated sequences, which matters more for some experiments than others. Thresholds by application, a worked chromatogram, and the current figure for every lot we sell.
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Seven checks that separate a supplier who tests every lot from one who copies a certificate: lot-matched COAs, a named lab, LC-MS identity, net peptide content, endotoxin, a real address, and how they talk about use. With a worksheet, an example support exchange, and the FDA's own test for intended use.
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Any researcher can send a sealed vial to an independent analytical lab and get purity by HPLC, identity by mass spectrometry and the milligrams actually in the vial back within about a week. What it costs, what to send, how to read the result against the supplier's certificate, and what to do when they disagree.
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A research peptide label carries seven fields that matter: compound name, net amount, lot number, purity claim, storage instruction, the research-use statement and the supplier. What each one should say, how to check it against the certificate, a worked label-to-certificate comparison, and the three things a label cannot tell you.
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.