can you mix vitamin c and glutathione for the skin Combining Glutathione and Vitamin C:

However, more research is needed to support this

This synergistic relationship between vitamin C and glutathione has been well-established in research, suggesting that combined supplementation may provide greater antioxidant protection than either nutrient alone

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(2017) The nutraceutical benefits of subfractions of Abelmoschus esculentus in treating type 2 diabetes mellitus

Collagen Protection GHK-Cu inhibits metalloproteinases (MMPs) enzymes that break down collagen and elastin

The safest answer is to start with the product label, introduce topicals slowly, and speak with a healthcare professional before using GHK-Cu internally or in clinical formats