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It was originally isolated from the blood of rabbits that had been induced into slow-wave (delta) sleep, which is how it got its name

"The human tri-peptide GHK and tissue remodeling." J Biomater Sci Polym Ed
2,97 The EFSA also states that B12 has not been found to be carcinogenic or mutagenic in in vitro and in vivo studies
Both deficiency and excess of GABA lead to nervous system disorders, so maintaining its proper level is very important
