Peptides are everywhere right now — in skincare, wellness routines, and “biohacking” conversations — often sold as if they’re all part of one powerful, science-backed category. But the truth is more fragmented. “Peptides” isn’t a single trend or treatment; it’s a broad class of molecules that includes everything from FDA-approved medications to cosmetic ingredients to experimental compounds still lacking human evidence. This post breaks down the most talked-about examples like BPC-157 and GHK-Cu, and why the gap between internet claims and scientific reality is much wider than it looks.