They can be combined when your health goals span both collagen stimulation and cellular energy
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GHK-Cu is the copper complex of glycyl-L-histidyl-L-lysine, often called GHK, GHK copper, copper peptide GHK-Cu, or copper tripeptide 1
It also enhances hydration, supports anti-aging effects, and provides antioxidant protection that contributes to healthier-looking skin over time
Vitamin B12 is completely water-soluble, meaning your body safely flushes out any excess, making toxicity non-existent
If irritation continues, apply an over-the-counter itch cream, preferably with hydrocortisone, or discontinue use and contact your provider