Research library

Peptide research, with the sources

Every article is written from the primary literature and cites it. Comparisons, lab procedures and the background a researcher needs before ordering.

Compound comparisons

How the compounds researchers weigh against each other differ, side by side, with the published research.

ComparisonBPC-157 vs TB-500: How the Research ComparesBPC-157 and TB-500 are both synthetic peptides studied in tissue-repair research, but they are unrelated molecules. BPC-157 is a 15-residue sequence derived fro…ComparisonCJC-1295 With DAC vs Without DAC (Mod GRF 1-29): How the Research ComparesCJC-1295 with DAC and CJC-1295 without DAC share the same tetrasubstituted, 29-amino-acid GHRH backbone; only the DAC version carries an extra lysine with a mal…ComparisonEpitalon vs Pinealon: Comparing Two Khavinson Bioregulator PeptidesEpitalon (also spelled Epithalon) and Pinealon are short synthetic peptides from the bioregulator program of Vladimir Khavinson's St. Petersburg institute. Epit…ComparisonGLOW vs KLOW vs Wolverine: What Is in Each Peptide Blend and What the Research ShowsGLOW, KLOW and Wolverine are research blends built on the same base. Wolverine Blend is BPC-157 plus TB-500; GLOW Blend adds the copper peptide GHK-Cu; KLOW Ble…ComparisonIpamorelin vs Sermorelin vs Tesamorelin: How the Research ComparesIpamorelin, sermorelin and tesamorelin all increase pituitary growth hormone (GH) release, but by two different routes. Ipamorelin is a five-residue agonist of …ComparisonKPV vs BPC-157: How the Research ComparesKPV and BPC-157 are unrelated peptides whose research overlaps mainly in one area: rodent models of intestinal inflammation. KPV is the three-residue C-terminal…ComparisonPT-141 vs Melanotan-2: How Bremelanotide and Melanotan II ComparePT-141 (bremelanotide) and Melanotan-2 (melanotan II) are closely related cyclic melanocortin peptides: PT-141 was developed from melanotan II and differs from …ComparisonSemax vs Selank: How the Research ComparesSemax and Selank are synthetic heptapeptides developed by Russian researchers. They share the same Pro-Gly-Pro tail but start from different parent peptides: Se…ComparisonThymosin Alpha-1 vs Thymosin Beta-4 (TB-500): Two Unrelated PeptidesThymosin alpha-1 and thymosin beta-4 are unrelated peptides that share a name only because both were first purified from the same calf-thymus extract. Thymosin …

Lab guides

Storage, certificates of analysis and how to vet a supplier.

GuideHow to Choose a Research Peptide Supplier: A Vetting ChecklistThe best research peptide supplier is the one whose claims you can check before you buy: lot-matched certificates from a named, independent laboratory showing i…GuideHow to Read a Peptide COA: A Field-by-Field GuideA peptide certificate of analysis (COA) is a laboratory report on one specific lot. It should name the lot, the testing lab and the test date, confirm identity …GuidePeptide Sciences Closed: How to Vet a Replacement Research Peptide SupplierPeptide Sciences, long one of the best-known research peptide suppliers in the US, stopped selling on March 6, 2026, and replaced its website with a short notic…GuidePeptide Storage and Stability: How to Store Lyophilized PeptidesLyophilized peptides keep best sealed, dry, dark and frozen (−20 °C, or −80 °C for long-term storage), and the closed vial should reach room temperature before …

Explainers

The background: what research peptides are and how they are made and verified.

ExplainerWhat Are Research Peptides? Research Use Only (RUO) ExplainedResearch peptides are synthetic peptides sold as laboratory reagents for in vitro and animal research, labeled research use only (RUO) and not intended for huma…

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