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Experimental vascular studies indicate that BPC-157 modulates endothelial nitric oxide synthase activity by altering the interaction between endothelial nitric oxide synthase and its regulatory binding partner caveolin-1 [1][2]

This is a quality indicator, not a formulation flaw its presence at application confirms an intact copper-peptide complex is being delivered

Injection site reactions: Minor redness or discomfort at injection sites is common with any subcutaneous administration

Hypertens Res (2009) 32:22937.10.1038/hr.2009.5 8 WrightJWHardingJW

PEPTIDE recovery BPC-157 Peptide therapy for tendon, ligament, muscle, and gut healing by consult