So our bodies produce GLP naturally
Symptoms of deficiency include fatigue, susceptibility to infections, and increased oxidative stress
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The copper coordination chemistry of GHK-Cu enables controlled cellular copper delivery while preventing the formation of reactive oxygen species characteristic of free copper toxicity, with the peptide's binding affinity (log K = 16.1) positioning it perfectly within the physiological copper transport hierarchy to facilitate controlled metal transfer to enzymatic targets including lysyl oxidase (essential for collagen cross-linking) and superoxide dismutase (critical for antioxidant defense)
Importantly, despite the dramatic decrease in the level of labeled M3 C3 in healthy and MMA hepatocytes treated with BCATi (Figure 3D), treatment with the inhibitor had no significant effect on the concentration of the unlabeled pool of C3 (M0 C3, Figure 3E) or the concentration of the total pool of C3 (M3 C3 + M0 C3 = total C3, Figure 3F) in healthy or MMA hepatocytes exposed to [ 15 N, 13 C 5 ]valine
generally no symptoms at rest, instead the symptoms usually start on standing or after walking a certain distance and this distance can vary from only a few metres to a few hundred metres