Intramuscular injection, by contrast, deposits peptide 1540mm deep (depending on needle length and injection site), requiring the compound to enter venous return, circulate systemically, and then diffuse back out of dermal capillaries to reach fibroblasts
[PubMed] [Google Scholar] 86.Diaz-Castro J., Mira-Rufino P.J., Moreno-Fernandez J., Chirosa I., Chirosa J.L., Guisado R., Ochoa J.J
This allows the peptide to circulate throughout the body, triggering deep-layer cellular repair and reaching hair follicles that topicals often cannot penetrate
High-strength retinoid and antioxidant creams are among the most requested compounded preparations in cosmetic dermatology
Apply a water-based GHK-Cu serum after cleansing and before moisturizing, ideally in the evening