Have you tried ghk-cu by IM route? I give it subq in the glutes every day but it leaves hard spots inside the glute. For the shoulder you might try bpc by itself in higher amounts like several mg directly in that spot, as it has helped my arthritis more than the bpc/tb mix and costs less in my view. Hoping to receive my bs monitor soon, the same model you have.
I injected 0.5 ml of Nad+ into the v glute along with 0.2 ml of glutatholine in my glute. Later tonight I plan to put 0.3 ml of Klow80 into my left delt, the shoulder that has been bothering me.