is reduced glutathione safe during pregnancy levels and miscarriage Is Glutathione Safe During Pregnancy

Second, rat Oatp1, the sinusoidal organic solute uptake transporter, was shown to function as a GSH/organic solute exchanger (Li et al., 1998), and thus could potentially contribute to GSH release from cells

Histidine metabolism drives liver cancer progression via immune microenvironment modulation through metabolic reprogramming

[1] One trial did find that oral supplementation of glutathione did have an effect on increasing your body's level of glutathione, indicating that at least some of it does still get through your system to take effect

PMID 19766714

As such, it acts as a cellular signal for oxidative stress and is involved in the regulation of cellular states such as proliferation or apoptosis