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At optimal concentrations, GHK-Cu increases mRNA production for collagen types I and III, elastin, proteoglycans, and glycosaminoglycans, while laboratory studies show that topical application for 12 weeks improves collagen production in 70% of subjects compared to 50% with vitamin C and 40% with retinoic acid
10.3389/fnut.2021.783659 Front Nutr
That means that one KwikPen has all four weekly doses that you need for the month
however, results vary and are not guaranteed
The serum supports overall tone care, while the patch provides targeted Vitamin C care for under-eye areas.
The commenter noted that the angiography procedure and the perfusion analysis are not always performed on the same date of service
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