Wow, i just googled butcherbalm, didn't know about creams with BPC157 & TB500. But does it realy get absorbed well-enough through skin? Or does it just work really well marketing wise?
I'm going for systemic with injections for multiple small but chronic injuiries. But a cream seems more wise for the localized idea for sure, more wise than pinning localized darts into "already injured" tissue.
Is it your product or something? It's a cool idea
From what I've learned, BPC-157 has a molecular weight of +1,400 Daltons, far too high to be absorbed transdermally. Unless they have a chemical penetration enhancer, or are using something like a micro-needling patch, dermal applications are a non-starter.
BPC-157 is also hydrophilic (water-loving), so it increases the difficulty of passing the lipid-rich layers of the skin.
Typically, unless methods stated above are used, a compound must have a molecular weight of less than 500 Daltons to be effective transdermally. There are other methods of opening pathways for larger molecules, but they wouldn't be possible for an at-home cream or poultice.