varies with administration technique
Glutathione Research FAQs What is Glutathione
Redox state of glutathione in human plasma
Other medications worth flagging include nitroglycerin (glutathione may blunt its vasodilating effect), certain antipsychotics, and long term proton pump inhibitors, which reduce stomach acid and impair absorption of cysteine precursors
The extent and clinical significance of this effect remain subjects of ongoing investigation, and individual responses vary considerably based on genetic factors affecting pigmentation, baseline skin characteristics, concurrent skincare practices and sun exposure, and overall health status affecting skin appearance
More recent clinical trials have found no difference in comparison to a placebo (Javed et al., 2015)