This is part of why peptide-focused vendors emphasize per-puncture aseptic technique and dedicated needles per draw direction
10.1177/096032719601500308 222 WinnerB.JappelliR.MajiS
How Do We Increase Our Glutathione Levels
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P. Sikiricet al., Stable Gastric Pentadecapeptide BPC 157, Roberts Stomach Cytoprotection/Adaptive Cytoprotection/Organoprotection, and Selyes Stress Coping Response: Progress, Achievements, and the Future, The Editorial Office of Gut and Liver, Mar. 2020. doi: 10.5009/gnl18490
Think about this: research-grade does not mean safe for human consumption. In other words, it would require outside testing from an independent lab just to verify that its what it says it is