# PSPeptides > PSPeptides is a US-based research peptide supplier offering US-manufactured, third-party tested peptides verified to 99%+ purity via independent HPLC and mass spectrometry testing. Based in New Jersey with over 5 years in operation and 5,000+ orders shipped. *Last updated: August 23, 2026* For the complete blog index (318 articles), see [llms-full.txt](https://pspeptides.com/llms-full.txt). ## Products - [Retatrutide (Triple-Agonist GLP-1/GIP/Glucagon)](https://pspeptides.com/product/buy-retatrutide/): Research peptide for metabolic studies. 5mg, 10mg, 20mg, and 30mg vials. From $39.99. - [Tirzepatide (Dual GIP/GLP-1 Receptor Agonist)](https://pspeptides.com/product/buy-tirzepatide/): Dual GIP/GLP-1 receptor agonist research peptide for metabolic studies. 10mg, 20mg, and 30mg vials. 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