Ghk dosage, whats your max

A group of us have been experimenting with different dosages for a few months ranging from 2m-10mg daily. Most of us noticed the biggest differences in the higher doses 5mg-10MG and all of noticed next to nothing on the standard 2mg.
Curious to what others have taken as a high dose and what are some things you have noticed.

Not recommending anyone does high dosage, research carefully