GHK-Cu is found in blood plasma and is an FDA-approved ingredient in topical antiaging cosmeticsbut it is currently banned as an injectable because of safety concerns, such as the risk of immune reactions caused by impurities
In fact, it was recently reported that the microbiota recovered from endometrial tissue samples was not fully reflected in paired endometrial fluid 53 , supporting the notion that different biological materials from the same anatomical location can yield different microbiota compositions
References: OLeary, F., & Samman, S
The purity assessment criteria for research-grade materials are generally much less rigorous, partially incomplete, and/or poorly followed, per a 2014 paper.21 Additionally, while some studies state that BPC-157 has good oral bioavailability based on its stability in human gastric juice, little if any research has investigated the differences in bioavailability between BPC-157 routes of administration.22 We could find only a single rat study that used oral BPC-157.23 So the best option would be an injectable form of BPC-157 from a reputable clinic
