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10.2147/CIA.S201250 Clin Interv Aging
So, in the context of glutathione, the reduced form is referring to cysteines sulfur atom keeping its electrons to itself (Figure 2)
"I'm sort of a control freak, but in life, we can't control everything," she added
References : [1] [3] [4] [5] [6] National Library of Medicine, Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data, Pickart, L., Margolina, A., July 2018 [2] National LIbrary of Medicine, The potential of GHK as an anti-aging peptide, Dou, Y., Lee, A., Zhu, L., Morton, J., Ladiges, W., March 2020