Peptide Sciences vs TX Research Peptides: Where Former Customers Should Go

<p>Peptide Sciences was the US research peptide market's largest vendor by revenue before its voluntary shutdown in March 2026. Thousands of researchers who relied on Peptide Sciences for years found themselves without a primary supplier overnight. This guide is for those researchers — explaining what made Peptide Sciences trustworthy and how TX Research Peptides compares on the dimensions that matter.</p><h2>What Peptide Sciences Got Right</h2><ul><li>Independent third-party testing with publicly accessible COAs</li><li>Large compound catalog covering most major research peptides</li><li>Strong compliance language — consistent research-use-only positioning</li><li>Educational content providing research context for each compound</li><li>Consistent quality reputation built over years of operation</li></ul><h2>TX Research Peptides: How We Compare</h2><h3>Purity Standard</h3><p>Peptide Sciences maintained ≥98% HPLC purity as their stated standard. TX Research Peptides specifies ≥99% — the premium tier of the research market.</p><h3>Third-Party Testing</h3><p>Both vendors use independent accredited third-party laboratories. TX Research Peptides provides batch-specific COAs with every order.</p><h3>Catalog</h3><p>TX Research Peptides carries the core research peptides that drove the majority of Peptide Sciences orders: BPC-157, TB-500, GHK-Cu, ipamorelin, CJC-1295, TZ2 – GLP2, RT3 – GLP3, NAD+, MOTS-c, and others.</p><h3>Compliance</h3><p>TX Research Peptides maintains strict research-use-only positioning throughout all product and marketing materials — matching Peptide Sciences' compliance standard.</p><h3>Location</h3><p>TX Research Peptides is US-based and Texas-operated — providing domestic supply chain accountability.</p><h2>What TX Research Peptides Offers That Peptide Sciences Didn't</h2><ul><li>Texas-based operations — same-state shipping for Texas researchers</li><li>Volume discount pricing (5-pack 10% off, 10-pack 15% off)</li><li>Pre-formulated research blends (KLOW, GLOW, BPC-157/TB-500)</li></ul><p>Q: Does TX Research Peptides carry all the same compounds as Peptide Sciences?</p><p>A: TX Research Peptides carries most of the core compounds previously available through Peptide Sciences. If you need a specific compound not listed in our catalog, contact our support team.</p><p>Q: Is the Peptide Sciences website still active?</p><p>A: As of March 2026, Peptide Sciences posted a shutdown notice and is no longer accepting orders. The website warns against unauthorized copycat sites.</p><p>Related: Shop All Products → | BPC-157 → | GHK-Cu → | Reconstitution Guide → | Contact Us →</p>