Peptide Science. Distilled.
Literature summaries, receptor-level comparisons, and lab protocols for in vitro peptide research — written for scientists, not marketers.
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Tirzepatide vs Semaglutide vs Retatrutide: A Receptor-Level Comparison
How the three leading incretin analogs differ at the receptor level — GLP-1, GIP, and glucagon agonism — and what that means for in vitro pharmacology workflows.
How to Read a Peptide Certificate of Analysis (COA)
A field guide to the values that actually matter on a peptide COA — purity by HPLC, observed mass, retention time, and counterion content.
Peptide Storage and Reconstitution Best Practices
Practical lab guidance for storing lyophilized peptides, reconstituting with bacteriostatic water, and maximizing working-stock stability.
GLP-1 Receptor Pharmacology: A Researcher's Primer
Background on the GLP-1 receptor — class B G-protein-coupled receptor biology, downstream cAMP signaling, and why peptide structure dictates binding kinetics.
TB-500 / Thymosin Beta-4: Actin-Binding and Angiogenesis Research
A literature summary of TB-500 (a synthetic fragment of Thymosin Beta-4), its actin-binding domain, and reported in vitro effects on cell migration and tubule formation.
GHK-Cu: Copper Peptide Research in Fibroblast and Wound Models
GHK-Cu is a tripeptide-copper complex extensively studied in fibroblast proliferation, collagen synthesis assays, and gene-expression panels.
Melanotan II vs PT-141 (Bremelanotide): Melanocortin Receptor Selectivity
A comparison of two melanocortin agonists at the receptor-subtype level — MC1R/MC3R/MC4R/MC5R activity and what selectivity means for in vitro pharmacology.
Tesamorelin vs CJC-1295: Two Approaches to GHRH Stability
How tesamorelin and CJC-1295 each extend GHRH half-life through different chemical modifications — and what that means for receptor binding studies.
Epitalon: Telomere and Pineal Research in In Vitro Models
A summary of Epitalon (Ala-Glu-Asp-Gly) research focused on telomerase activity in cell-culture longevity models.
IGF-1 LR3 vs PEG-MGF: Anabolic Pathway Research
Two IGF-family analogs with engineered half-life extensions — and how their pharmacology differs in muscle cell culture and proliferation assays.
HPLC Purity: What "≥99%" Actually Means
Demystifying the purity number on your peptide COA — what 99% means analytically, what the missing 1% typically contains, and why it matters for research reproducibility.
All articles are provided for informational and research-context purposes only. Products discussed are intended for in vitro research use only and are not approved for human or veterinary use.