A peptide can test 99.9% pure and still contain bacterial endotoxins, heavy metals, or microbial growth
Packaging and labeling dont always make the distinction obvious to a casual reader, and the terms get used loosely in conversation, online forums, and even some product listings
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Incorrect storage can compromise sterility, shorten usability, or risk contamination
Activatable probes further advance this approach by producing signals upon recognition of disease-related biomarkers, which reduces background interference and improves imaging specificity
(8) A.Duzel (2018) Stable gastric pentadecapeptide BPC 157 in the treatment of colitis and ischemia and reperfusion in rats: New insights World Journal of Gastroenterology, 2017 Dec 28;23(48):8465-8488