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Shelf Life and Stability of Lyophilized Research Peptides

How long a research peptide stays usable depends less on a date on a label and more on the form it is in and how it is stored. Here is what shelf life actually means for research peptides, why the freeze-dried form is so stable, and the factors that affect it. What shelf life means […]

Endotoxin Testing Explained: What LAL Results Mean

Purity and identity get most of the attention on a Certificate of Analysis, but a thorough COA often includes one more quality measure: endotoxin testing. Here is what endotoxins are, how laboratories test for them, and what the result tells a researcher. What endotoxins are Endotoxins are lipopolysaccharides, a component of the outer cell wall […]

What Is Peptide Purity, and How Is It Measured?

Purity is one of the most important numbers on a research peptide’s Certificate of Analysis, and one of the most misunderstood. Here is what purity actually measures, how laboratories determine it, and how to read it with confidence. What purity means Purity is the proportion of a sample that is the intended peptide, as opposed […]

Research Peptide Glossary: Key Terms Explained

New to research peptides, or just want a quick reference? This glossary defines the terms you will see most often on product pages, Certificates of Analysis, and lab documentation. Every definition here is written for laboratory research context. Peptide. A short chain of amino acids linked by peptide bonds. Peptides are smaller than proteins and […]

What “Made in the USA” Means for Research Peptides

When you are sourcing research peptides, country of origin is easy to overlook and surprisingly important. “Made in the USA” is more than a label. It speaks to how a compound is synthesized, tested, handled, and documented before it reaches your lab. Here is what domestic manufacturing actually means for research materials, and why it […]