How Long Does BPC 157 Take to Work? Timeline and Guide The peptide, the fitness world is obsessed with but what does the science actually say? BPC 157 (Body Protective Compound 157) has taken over gyms, Reddit threads, and biohacker forums. Athletes swear by Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with Why RFK Jr. backs peptides but questions vaccines STAT