bpc 157 need to be refrigerated BPC-157 Benefits, Dosage & Before/After Results does bpc-157 need to be

10.1126/science.286.5439.525

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This may be a physiological role (in situ hybridization and immunostaining BPC 157 in human gastrointestinal mucosa, lung bronchial epithelium, epidermal layer of the skin and kidney glomeruli), and BPC 157 may act as stabilizer of cellular junction, leading to significantly mitigated leaky gut syndrome, via increasing tight junction protein ZO-1 expression, and transepithelial resistance [19]

The caution is that this whole area still sits on a spectrum from promising to poorly regulated, depending on where and how it is being offered