If you're combining the two, the protocols that seem to work involve diluting the copper peptide product, using it no more than once weekly after needling, and starting with conservative needle depths (0.5mm, not 1.5mm)
C., Chen, S
Diabetic Wound Healing Diabetic wound healing studies in rats using collagen dressings with GHK demonstrated higher glutathione and ascorbic acid levels, better epithelialization, 9-fold increased collagen synthesis in healthy rats, and activation of fibroblasts and mast cells
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For subcutaneous xenografts, BALB/c-nu/nu mice (male, 68 weeks, 18 1.5 g) were housed under controlled conditions (2224 C, 4060% humidity, 12-h light cycle) and randomly divided into subgroups
doi: 10.1016/j.anifeedsci.2018.01.017