The thigh, buttocks, or upper arm are the best spots due to their muscle depth and ease of access
Scientific research has demonstrated that GHK-Cu can upregulate or downregulate over 30 human genes associated with: Tissue repair Cell growth Inflammatory control This gene-modulating capability allows GHK-Cu to function at a deeper cellular level , yielding more sustained and significant results compared to peptides that act only on the surface via receptor binding (Pickart & Margolina, 2012)
The effect on motility is in accordance with the studies in animals (both dietary or selenoproteins knockout interventions), which have shown defects in mitochondria, midpiece, and tails of spermatozoa, resulting in lower motility, viability, and fertilizing ability (see Sections 2 and 4)
The diagnosis of mild cognitive impairment due to Alzheimer's disease: recommendations from the National Institute on Aging-Alzheimer's Association workgroups on diagnostic guidelines for Alzheimer's disease