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Another reason for getting tired and staying that way is a lack of specific nutrients like vitamin B12
It penetrates the outer skin layers and acts locally on skin cells, fibroblasts, and the extracellular matrix
Absorption timing research A study on human skin penetration found that GHK-Cu has a lag time of 2 to 7 hours depending on the skin layer being measured
Unfortunately, plant foods have no vitamin B12, unless they have been fortified
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