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So researchers at Washington State University chemically modified it into something sturdier that could survive being swallowed and cross the blood-brain barrier (the filter that keeps most substances in your bloodstream out of your brain tissue)

(2019) "Gastric pentadecapeptide body protection compound BPC 157 and its role in accelerating musculoskeletal soft tissue healing" Cell and Tissue Research Xing et al

The pH was adjusted to 6 with 1 M NaOH

Different effects of intraperitoneal and subcutaneous insulin administration on the GH-IGF-1 axis in type 1 diabetes

Owing to space considerations we apologize for not citing many important contributions to this field