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For systemic effects, injection may be preferred
GHK-Cu has been compared to other skincare products, such as retinol and vitamin C creams, and has shown positive effects, with some people anecdotally reporting improvements in their skin, such as reduced crow's feet, although a study on hair did not seem too promising 7m10s
Slower wound healing and tissue remodeling
This translated into an absolute risk reduction of about 0.69%
The oral administration of B12 (in pill form) carries significant drawbacks: Vitamin B12 is absorbed in the terminal ileum
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