A decade later, experiments performed by Kuiper et al
Subcutaneous injections can be administered at the side or back of the upper arm, lower abdomen, and front of the thigh
Side effects of GHK-Cu (Copper Peptide) Skin Rejuvenation & Anti-Aging, Hair Growth & Scalp Health, Wound Healing & Tissue Repair Peptide Possible side effects include mild stinging, redness, itching, dryness, or temporary irritation, especially on sensitive or compromised skin
However, if you only take half your antibiotic course or consume meat that contains traces of antibiotics, you can make bacteria more antibiotic-resistant
For a deeper explanation, see How Long Do Reconstituted Peptides Last When to Use Sterile Water Sterile water is typically preferred in controlled, single-use scenarios