The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Aesthetics Infinity Medical Institute While GHK Cu may not be a widely recognized compound, its presence and function within the human body are well established. GHK Cu (Copper Peptide) is endogenously produced and plays a role in various physiological GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit Therapeutic Peptides in Aesthetic, Metabolic and Endocrine Conditions: Effects, Safety, Clinical Applications, and Future Perspectives