For research purposes only
Research Library
Documentation on compound structure, mechanisms, analytical verification, and the research peptide market. Every article cites peer-reviewed literature and is written for research use only.
Research Peptide Supply News, September 2026: Peptide Sciences, Amino Asylum, Science.bio, and the FDA 503A Decision
September 2026 status update on the research peptide supply landscape: Peptide Sciences remains closed since March 6, Amino Asylum has been offline since the June 2025 raid, Science.bio closed January 27, and the FDA has not yet acted on the July advisory committee vote on BPC-157. What is confirmed, what is not, and what researchers should watch. For research purposes only.
How Third-Party Peptide Testing Labs Verify Purity: HPLC, Mass Spec, and Amino Acid Analysis
An independent peptide testing lab runs reverse-phase HPLC for purity, LC-MS for identity, and amino acid analysis for net peptide content, then reports each with its method. What each test measures, what ISO 17025 accreditation covers, and how a third-party report differs from a vendor COA. For research purposes only.
What Is GLP-3R? Retatrutide Naming, Receptor Pharmacology, and the GLP-3 Label Explained
GLP-3R is a market label, not a hormone. It refers to retatrutide (LY3437943), a synthetic triple agonist studied at the GIP, GLP-1, and glucagon receptors. Where the name came from, how it relates to the GLP-1 and GLP-2 labels, and what the receptor pharmacology actually is. For research purposes only.
BPC-157 and the FDA 503A Bulks List: What the July 2026 Advisory Committee Vote Actually Means
A news analysis of the July 2026 FDA Pharmacy Compounding Advisory Committee vote recommending BPC-157 for the Section 503A Bulk Drug Substances List — the regulatory history, what the vote does and does not change, and the mechanism literature behind the most-discussed pentadecapeptide in research. For research purposes only.
Melanotan 2: Molecular Structure and Research Overview
A research overview of Melanotan 2, a synthetic cyclic heptapeptide analog of alpha-MSH studied as a nonselective melanocortin receptor agonist. Covers molecular structure, receptor pharmacology, and its role in pigmentation and energy-homeostasis research models. For research purposes only.
Follistatin: Molecular Structure, Activin Antagonism, and Myostatin Research Overview
A mechanistic deep-dive into Follistatin, covering its domain architecture, TGF-β superfamily antagonism, and why it is studied as a dual inhibitor of activin and myostatin signaling. For research purposes only.
Research Peptide Vendor Shutdowns in 2026: Who Closed, Who Is Still Operating, and How to Source Now
A factual look at the 2025-2026 wave of research peptide vendor closures, what drove it, which suppliers are confirmed shut down versus still operating, and the criteria researchers should apply when qualifying a replacement supplier.
Retatrutide (GLP-3): Molecular Structure, Receptor Pharmacology, and Research Overview
A research overview of retatrutide, a synthetic triple receptor agonist studied for its activity at the GIP, GLP-1, and glucagon receptors. Covers molecular structure, receptor pharmacology, and how it differs from single-target GLP-1 receptor agonists. For research purposes only.
TB-500 (Thymosin Beta-4 Fragment): Structure, Actin Regulation, and Research Overview
A research overview of TB-500, a synthetic peptide related to the actin-binding region of Thymosin Beta-4. Covers molecular structure, the relationship to native Thymosin Beta-4, actin regulation, and why it is studied alongside BPC-157 in tissue-repair research models. For research purposes only.
Best Peptide Sciences Alternative in 2026
Peptide Sciences shut down in 2026. Compare the top alternative for research peptides: ≥99% verified purity, third-party CoAs, and HPLC verification.
Peptide Sciences Shut Down: What Happened (2026)
Peptide Sciences closed with no warning on March 6, 2026. Here's what actually happened, why they shut down, and the vetted suppliers researchers moved to.
BPC-157 Molecular Mechanisms and In Vitro Findings: A Literature Review
Comprehensive study of BPC-157 molecular structure, signaling pathways, and regenerative biological mechanisms. Synthesis of peer-reviewed data and structural findings.
Thermal Stability of Research Peptides in Transit: A Scientific Review
How temperature drives peptide degradation during shipping. Hydrolysis, oxidation, deamidation, aggregation, moisture uptake, and the analytical methods that detect thermal damage.
GLP-1 Receptor Agonist Peptides: Molecular Pharmacodynamics and Research Application
Technical review of GLP-1 receptor agonist molecular mechanisms, binding affinity, and structural analogs. Analysis of current research models and peer-reviewed findings.
Peptide Purity: How HPLC and Mass Spec Verify It (2026 Guide)
How research peptide purity is verified: what HPLC and mass spectrometry measure, how to read the numbers, and the identity checks that separate a clean batch from a questionable one. For research purposes only.
How to Read a Peptide COA (Certificate of Analysis): 2026 Guide
What a peptide COA should include and how to read one line by line: identity specs, HPLC purity, mass spec confirmation, and the red flags that signal a batch you should reject.
Neuroactive Peptide Profiles in Cognitive Research: Comparative Mechanisms of Semax, Selank, and Dihexa
Research-focused comparison of Semax, Selank, and Dihexa examining BDNF modulation, anxiolytic mechanisms, HGF/c-Met signaling, and neuroprotective findings in published literature.
Growth Hormone Secretagogue (GHS) Peptides: Comparative Research Specifications
Comparative analysis of GHS peptides including CJC-1295, Ipamorelin, Sermorelin, and Tesamorelin. Molecular weights, binding sequences, and published receptor findings.
Molecular Mechanisms of Longevity Peptides: Comparative Research on Epitalon, FOXO4-DRI, and GHK-Cu
Research comparison of Epitalon, FOXO4-DRI, and GHK-Cu examining telomerase activation, senescent cell clearance, and copper-peptide tissue remodeling in published scientific literature.
Comparative Pharmacodynamics of Metabolic Peptides: GLP-1, GIP, and Dual Agonist Research
A research-focused comparison of GLP-1, GIP, and dual GIP/GLP-1 agonist peptides including tirzepatide, examining receptor binding, metabolic mechanisms, and published research outcomes.
Quality Documentation Standards in Peptide Research: A Comparative Review
Critical assessment of quality documentation in the research peptide industry. Analysis of CLIA certification, GMP compliance, and Specification Standard requirements for research compound verification.
BPC-157, TB-500 & Epitalon: Structure and Sequence Compared
A side-by-side research comparison of BPC-157, TB-500, and Epitalon: amino acid sequences, molecular structure, and the signaling mechanisms studied in the literature. For research purposes only.