Not all purity certificates are created equal. A manufacturer-issued certificate reflects the supplier’s own internal testing, while a third-party, accredited laboratory result is generated independently of the entity selling the compound.
High-performance liquid chromatography (HPLC) remains the standard analytical method for verifying peptide purity and identity, given its ability to separate and quantify individual compounds within a sample with high resolution.
Laboratory accreditation signals that a testing facility’s methods, equipment calibration, and reporting standards have been independently reviewed against a recognized quality framework, which is a meaningfully different bar than an in-house quality control process.
GLP1 Research Lab uses accredited third-party laboratories for every batch we sell, and publishes the resulting Certificate of Analysis for every product in our catalog.
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