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Glutathione is often called the "master antioxidant" because it is found in high concentrations in nearly every cell in the body
The GST tag enhances the solubility of fusion proteins expressed in Escherichia coli and is used to purify fusion proteins due to its ability to bind to immobilized glutathione (GSH) on agarose beads 1
However, GHK-Cu is recognised for its ability to promote collagen synthesis, which is necessary for maintaining skin suppleness and reducing oxidative stress
No blood draw required
The Bottom Line Not all antioxidants work in the same way, and that is exactly why they should not be viewed as competing options
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