ghk-cu and acne An Essential Guide to for ghk-cu acne before and after
Description
Other investigators detected a gradually decreasing with age concentrations of IGF-1, independent of gender (5557)

Other Vitamin B-12, folic acid, and potassium are the most common nutritional deficiencies
doi: 10.3389/fmicb.2011.00069 82

It supports the natural production process rather than replacing it, making it a "precursor" supplement