US$ 27.47
ghk-cu levels decline with age The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive GHK-Cu Copper Peptide Regeneration Review
Description
In mice, research has shown that METH-induced glucose transporter and uptake downregulation is an important causative factor for BBB integrity loss (Xue et al., 2019)

That decline is one reason GHK-Cu supplementation tends to produce more visible results in patients over 3540

"I not only give this to my patients, I take this as well

Sleep 31 (5), 14 (2008)
