is ghk-cu a naturally occurring human peptide – Research GHK-Cu - Peptide for Collagen,
Description
This period of time varies depending on whether the finding was minor or major

The FUT2 secretor variant p.Trp154Ter influences serum vitamin B 12 concentration via holo-haptocorrin, but not holo-transcobalamin, and is associated with haptocorrin glycosylationHum Mol Genet2017;26:4975-88

This is the only scientifically demonstrated pharmacologic agent thats been shown to reduce the severity of EIPH. Exactly how furosemide accomplishes this mitigating effect isnt entirely clear

A reputable pharmacy will be transparent about these matters
