Lets be direct
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The typical sites are the upper arm, thigh, or gluteal muscles for IM injections, and a suitable vein for IV injections
The warnings, dated December 10, were issued to Prime Peptides, Summit Research Peptides, Swisschems and Xcel Research, all of which were found to be selling unapproved GLP-1 treatments that, despite being labelled as for research purposes, were marketed for human use
If you're storing reconstituted solution at room temperature for weeks, or using it past 14 days, or exposing vials to direct light during storage, you're injecting degraded peptide fragments that retain minimal biological activity