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Are there any side effects associated with GHK-Cu
It has the ability to improve brain function because it can cross the protective membrane of the brain (blood-brain barrier), meaning that it can increase the energy metabolism of brain cells
10.1038/nsmb.1474 Nat
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The immediate effects are most pronounced in sports like weight lifting, cycling, and sprinting, where there is a more direct relationship between raw physical ability and results
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