The missing piece might be vitamin b12
Extracellular amino acid uptake via compensatory transporters Amino acids, including aspartate, arginine, and asparagine, are associated with resistance to glutamine depletion
(2) Wound Healing and Tissue Repair The addition of GHK-Cu to wound care works the same as in skin care, by signaling the fibroblast to produce new collagen, elastin, and glycosaminoglycans, and reducing inflammation around the injury to naturally rebuild a new extracellular structural matrix
Luan et al., 2019)
The frequency and severity of gastrointestinal symptoms can vary depending on the formulation (tablets, sublingual preparations, or liquid forms), the dose administered, and individual patient factors such as existing digestive conditions or sensitivities to inactive ingredients in the supplement