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It is crucial to use a new, sterile syringe for each measurement to avoid any contamination or cross-contamination between different experiments

However, when very high oral doses are taken, approximately 1% can be absorbed through passive diffusion, independent of intrinsic factor, which explains how mega-doses can still raise serum levels

Reduce alcohol consumption and quit smoking when taking glutathione as they lead to excess oxidative stress and reduce the functioning of the supplement

We can maintain our natural glutathione level high by adopting some lifestyle changes such as healthy eating, quality sleep, stress management, well hydration and regular physical activities

10.1186/s12931-016-0500-y Respir Res