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The Lancet HIV .PMID 31611038Read source Stanley TL, Falutz J, Mamputu JC, et al

Because BPC-157 is not FDA-approved, patients should avoid purchasing peptides from unverified online sellers or research chemical websites

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however, some individuals may experience mild skin sensitivity depending on: Formulation concentration Skin type Frequency of cosmetic application Concurrent cosmetic ingredients Possible Cosmetic Reactions Mild redness Temporary tingling sensations Skin irritation Dryness Increased skin sensitivity Temporary blue discoloration when higher concentrations are utilized Higher concentrations are not always preferred and may increase the likelihood of cosmetic skin irritation, particularly in sensitive-skin formulations