ghk-cu what is it Neurogan Order GHK-Cu (50mg) | Buy
Description
References Jzwiak, M., Bauer, M., Kamysz, W., & Kleczkowska, P

C., Case-Smith, J

Methionine synthase and Methylmalonyl-CoA mutase

Were they using an impure product from a questionable source

(2021) Vitamin B12 (cobalamin)

So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change
