ghk-cu naturally occurring in humans Skin Perfection 1% Copper Peptides Serum for Face Hair Scalp .5 oz GHK-Cu: The Peptide That Transforms
Description
Research demonstrates that copper ions can inhibit up to 90% of type 1 5-alpha reductase at specific concentrations

Findley, M

This can lead to wrong supplements, which can mess with cancer treatment

From a 10 mg/3 mL vial (3.33 mg/mL): 0.72 mL = 72 units
This is why research suggests that an optimal combination of the three vitamins, B1, B6 and B12, is more effective at relieving nerve damage symptoms and restoring nerve function than taking a single vitamin supplement