This independent UV-Vis spectrophotometry lab test confirms GLP-1S 5mg from IonPeptide at 99.8% purity. Vial A tested at 5.21mg with 99.8% purity and Vial B tested at 5.35mg with 99.8% purity. The analysis was conducted by Analytical Formulations, Inc. on February 28, 2026.
GLP-1S, also known as Semaglutide, is a GLP-1 receptor agonist researched for its role in metabolic regulation, weight management, and glycemic control. A purity level of 99.8% indicates minimal contamination and high-grade synthesis, with the sample appearing as white lyophilized powder in clear glass vials with white caps and silver crimps.
The full certificate of analysis is available for download on this page.

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