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People can also have 'normal' levels of B12 in their blood, but be symptomatic - this is known as a functional B12 deficiency
10.1016/j.jbc.2022.102037 130
When GHK-Cu is present, your body gets the message to rebuild collagen, heal tissue, activate hair follicles, and reduce inflammation
In this process, GSH covalently binds to the vulnerable cysteine residues of various cellular proteins
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