Tretinoin 0.1% promotes 21% increase in dermal collagen fiber organization after 6 months (histologically confirmed)
Low levels of vitamin B12 and vitamin D could be the reason
The tingling seems to have improved, but the twitches have not
A., Journal of Molecular Structure , 2014 , 1075 , 311
Higher-dose or higher-frequency research protocols may increase observations of: Skin-related sensitivity Local irritation Copper-related biomarker variability Individual sensitivity-related responses Zinc & Vitamin C Research Context Research involving GHK-Cu commonly includes: Zinc supplementation Vitamin C supplementation because of their established roles in: Collagen-related signaling pathways Skin integrity and dermal maintenance Tissue maintenance and regenerative pathways Hair and scalp biology Antioxidant and oxidative stress regulation Why Zinc Is Commonly Used Alongside GHK-Cu Because GHK-Cu is a copper-binding peptide, prolonged or higher-frequency research exposure may influence copper and zinc balance in some research settings

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