What Is a COA for Peptides?
A COA (Certificate of Analysis) for peptides is a document from an analytical laboratory that verifies the identity, purity, and quality of a peptide batch using HPLC and mass spectrometry.
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Bioregulator Peptides Explained: Pinealon, Cortagen, Crystagen & More
What Are Bioregulator Peptides — And What Does the Research Show? Bioregulator peptides are a class of short synthetic peptides — typically 2-4 amino acids — developed through decades of research at the Saint Petersburg Institute of Bioregulation and Gerontology, primarily by Professor Vladimir Khavinson. The bioregulation hypothesis proposes that specific short peptides can interact…
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What Happened to Peptide Sciences?
Peptide Sciences ceased operations in March 2026, shutting down its website and stopping all orders. The closure followed increased FDA enforcement against peptide suppliers.
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Are Peptides Legal in the US in 2026?
Yes, peptides are legal to purchase for research purposes in the United States in 2026. They are sold as research chemicals and are not classified as controlled substances.
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How to Evaluate Peptide Quality: A Researcher’s Guide
Why Peptide Quality Matters — And How to Evaluate It In research chemical markets, not all peptides are created equal. The difference between a 95% pure peptide and a 99% pure peptide can mean the difference between meaningful research results and noise. Contamination with synthesis byproducts, incorrect sequences, or degraded material doesn’t just reduce potency…
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What Is Bacteriostatic Water?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative, used to reconstitute lyophilized peptides and other compounds while preventing bacterial growth.
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How to Reconstitute a Peptide Vial
To reconstitute a peptide vial, draw bacteriostatic water into a syringe, inject it slowly along the vial wall, and gently swirl until the powder dissolves completely.
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What Is the Difference Between Research-Grade and Pharmaceutical-Grade Peptides?
Research-grade peptides are synthesized for laboratory use at ≥98% purity, while pharmaceutical-grade peptides meet FDA cGMP manufacturing standards for human clinical use.
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Peptide Injection Guide: Subcutaneous vs Intramuscular
Understanding Peptide Injection Methods in Research Peptide administration method is one of the most practical — and most frequently asked — questions in peptide research. The route of administration directly affects bioavailability, absorption kinetics, and tissue distribution. Choosing the wrong method can invalidate research results entirely. This guide covers the two most common injection methods…
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What Is Peptide Purity?
Peptide purity is the percentage of the target peptide in a sample versus impurities like truncated sequences, deletion peptides, and residual solvents, measured by HPLC analysis.