liposomal glutathione used for Glutathione: Benefits and Supplements High Absorption Liposomal Glutathione

It's a more meaningful decision than it first appears vial size affects cost-per-milligram, reconstitution concentration, and how much usable research window you get before reconstituted material should be discarded

While colorimetry and spectrophotometry are similar methods, the main difference lies in the wavelengths used by the two, with spectrophotometry using a wider range of wavelengths including those outside the visible range (Difference between colorimetry and spectrophotometry, 2011)

resistance is associated with lowered levels of glutathione

Equal amounts of protein were separated by 10% sodium dodecyl sulfatepolyacrylamide gel electrophoresis and transferred onto polyvinylidene difluoride membranes

Mol Psychiatry (2001) 6(3):2589

The paper seems to be full of unproven claims rather than anything convincing to me data-wise