What Is a Peptide? Structure, Function and Why It Matters in Research
A plain-language primer on what peptides are, how they are built from amino acids, and why short chains of residues occupy so much of modern research.
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sermorelin
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Sermorelin: A Review of GHRH-Analogue Research
Sermorelin is the first 29 amino acids of human GHRH. What the pediatric, aging and mechanistic literature actually recorded, and where the evidence stops.
Understanding Peptide Purity: What 99% Does and Doesn’t Tell You
A purity figure is a chromatographic ratio, not a statement about everything in the vial. What the number measures, what it leaves out and how to read it.
Tesamorelin: What the Clinical and Preclinical Literature Shows
Tesamorelin is a stabilized GHRH analogue and the active ingredient of Egrifta. Its phase 3 trials, liver and cognition studies, and evidence limits.
Why Third-Party Lab Testing Matters for Research Peptides
A supplier grading its own product is a conflict of interest, not a quality system. What independent testing adds, what it cannot fix, how to read it.
Mass Spectrometry: How a Peptide’s Identity Is Confirmed
Purity tells you how much of a sample is one thing. Mass spectrometry tells you what that thing is. Here is how the identity check works.
GH vs. GHRH vs. GHRP: Untangling the Growth-Hormone Axis
Three classes of molecule act at three points in the growth-hormone axis. What each is, which receptor it binds, and why the distinction matters.
Lyophilization: Why Research Peptides Ship as Freeze-Dried Powder
Freeze-drying removes water by sublimation at low temperature, leaving a porous solid that resists the chemical reactions that degrade peptides in solution.
Net Peptide Content vs. Purity: Two Numbers, Two Different Questions
A vial can be 99% pure and 75% peptide by weight at the same time. Counter-ions, bound water and how amino-acid analysis resolves the difference.
Endotoxin Testing in Peptide Quality Control
Endotoxin is the contaminant that survives sterilization. How LAL and recombinant assays detect it, and what an endotoxin result on a COA means.
All content in the research library is educational and intended for qualified researchers. Products referenced are for laboratory research use only and are not approved for human or veterinary use. Nothing here is medical advice.