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This independent HPLC lab test with UV detection coupled with mass spectrometry (LC-MS) confirms DSIP 10mg from Petratide Science at 99.07% purity. Endotoxin testing was performed using Limulus Amebocyte Lysate assay in accordance with USP #85; both replicates passed with assay sensitivity of 50.05 EU/mL. The analysis was conducted by Freedom Diagnostics on May 30, 2026.
DSIP (Delta Sleep-Inducing Peptide) is a nonapeptide researched for its effects on sleep quality, sleep architecture, stress reduction, and circadian rhythm regulation. A purity level of 99.07% indicates pharmaceutical-grade synthesis with minimal contamination.
The full certificate of analysis is available for download on this page.

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