Protein S -glutathionylation is an important post-translation modification, providing protection of protein cysteines from irreversible oxidation and, at the same time, serving to transduce a redox signal by changing structure/function of the target protein
If the key bends, rusts, or breakswhich can happen when its exposed to environmental stressorsit no longer works
Using substances that could affect fitness for duty, even if undetectable on standard tests, may violate regulations or orders
But beyond that, you really shouldnt feel anything at all
References Abdalrahman SS, Smail HO, Shallal AF
It's used off-label for hair loss based on its mechanism and growing clinical evidence