Research & guides.
Plain-language, analytically rigorous guides on peptide quality, testing, and handling — written for researchers at the bench. For laboratory research use only.
BPC-157: A Research Overview
Biochemistry, studied mechanisms, and preclinical research context for the synthetic pentadecapeptide BPC-157. Research use only.
ReadGHK-Cu (Copper Tripeptide-1): Research Overview
The copper tripeptide GHK-Cu: coordination chemistry, mechanisms studied in vitro, and preclinical and cosmetic-science research context. RUO.
ReadTB-500 (Thymosin Beta-4 Fragment): A Research Overview
The synthetic actin-binding fragment TB-500: identity, mechanism, preclinical research areas, and WADA status. Research use only.
ReadCJC-1295 / Ipamorelin: A Research Overview
The GHRH-analog and ghrelin-receptor peptide blend: receptor pharmacology and preclinical endocrine research context. Research use only.
ReadGLP-3 RT (Retatrutide): Preclinical Research Overview
The triple GLP-1/GIP/glucagon receptor agonist retatrutide: receptor pharmacology studied in preclinical metabolic research. Research use only.
ReadGLP-2 TZ (Tirzepatide): Preclinical Research Overview
The dual GIP/GLP-1 receptor agonist tirzepatide: receptor pharmacology studied in preclinical metabolic research. Research use only.
ReadThird-Party Peptide Testing: How Independent Labs Verify Purity — and How to Confirm a Report Is Real
How independent labs test peptides by HPLC and mass spectrometry, what ISO/IEC 17025 accreditation signals, and how to verify a certificate of analysis is authentic rather than fabricated.
ReadPeptide Impurities Explained: Deletion, Truncation, Oxidation, and Deamidation
What the other peaks on a chromatogram actually are — truncation and deletion sequences from synthesis, plus methionine oxidation and asparagine deamidation from storage — and how HPLC and mass spectrometry tell them apart.
ReadBeyond Purity: Endotoxin, Sterility, and Bioburden Testing for Research Peptides
Why HPLC purity isn't the whole quality story: bacterial endotoxin (LPS) detection by LAL and recombinant Factor C, EU/mg units, sterility vs bioburden testing, and why they matter for confound-free in-vitro research.
ReadWhat Is Lyophilization? Freeze-Drying and Why Research Peptides Are Supplied as Powder
What freeze-drying is and why research peptides ship as powder: the freezing, primary-drying, and secondary-drying stages, lyoprotectants and bulking agents, the cake vs collapse, and reconstitution as lab science.
ReadIncretin Receptor Pharmacology: GLP-1, GIP, and Glucagon Receptors
A receptor-level reference: class B GPCR signalling and cAMP readouts, how EC50 and Emax are measured and why they differ between papers, what mono-, dual-, and triple-agonist actually describe, and the hard limit of what assay data can show.
ReadPeptide Nomenclature and Sequence Notation
How to parse the identity string on a certificate: one- and three-letter codes, N-to-C reading order, what Ac- and -NH2 change about a molecule, Aib and D-residues, fragment numbering, and monoisotopic versus average mass.
ReadBacteriostatic Water vs Sterile Water vs Purified Lab Water: Diluents for Reconstituting Research Peptides
What separates the three liquids commonly used to dissolve lyophilized research peptides: what “bacteriostatic” actually means, the role of 0.9% benzyl alcohol, why trace metal ions and pH matter, and why a diluent cannot have an HPLC purity figure.
ReadHow to Read a Peptide Certificate of Analysis (COA): A Research Buyer's Guide
A technical, research-use-only guide to reading a peptide Certificate of Analysis: HPLC purity, mass-spec identity, net peptide content, endotoxin, and lot verification.
ReadHPLC Purity vs Mass Spectrometry: What Each Test Proves
RP-HPLC proves peptide purity; mass spectrometry proves identity. Learn how to read a chromatogram and a mass spectrum, and why a COA needs both tests.
ReadNet Peptide Content vs. Purity: Why Labeled Milligrams Aren't All Peptide
Net peptide content and HPLC purity measure different things. Learn how counter-ions, water, and residual solvents affect true peptide mass and accurate mg/mL lab prep.
ReadPeptide Storage and Stability: Lyophilized vs In Solution
How research peptides degrade and how to store them: lyophilized-powder stability at -20/-80 C, why solutions are less stable, freeze-thaw, and oxidation-prone residues.
ReadWhat Is Research Use Only (RUO)? A Buyer Reference
Research Use Only (RUO) explained for lab buyers: what the designation means, RUO vs GMP and clinical grade, buyer responsibilities, and what COAs and testing to expect.
ReadResearch Bench Guide — Peptide Handling & Storage
A fast, at-a-glance FAQ covering reconstitution, storage and stability, HPLC purity, reading a COA, and Research Use Only handling — the short version of the guides above.
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