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Is it necessary to use a preservative in my DIY serum

Nelson, M

[DOI] [PMC free article] [PubMed] [Google Scholar] 442.Chu, C

Understanding the Research-Stage Peptide BPC-157, or Body Protection Compound 157, is a synthetic 15-amino acid peptide sequence derived from a protective protein naturally occurring in human gastric juice

JAMA 300 , 509519 (2008)