J Clin Invest (2003) 112:35766
The minor benefits of sublingual administration do not justify the typically higher cost
Cancer Res (2008) 68(23):974653
The remaining six products tested below label claims, with results varying significantly in severity, including two products with no detectable glutathione and one returning under 2% of the stated dose
Michael Adler, Venkata Appa Reddy Goli, Andrea Allmendinger and Hanns-Christian Mahler, discuss the various factors that need to be considered when transferring to a delivery device for subcutaneous injection, such as a prefilled syringe or autoinjector, during clinical trials or post launch, especially when transferring from a vial format for intravenous infusion

The difference between the effects of both QIs on the cell viability ( Figure 2 ) and caspase 3 activation ( Figure 4 ) suggests that upon GSH depletion, the decrease in cell viability is not only apoptosis dependent but also most likely depends other cell death pathways, such as necrosis ( IC 50 values of QIs under GSH-depleted conditions were around 20 M ( Figure 2 ), which is higher than the plasma concentrations of AQ and DEAQ found in patients, normally in nanomolar to micromolar ranges ( in vivo may be lower, exposure continues for a prolonged period as the half-life of DEAQ is 10 to 12 days ( The relative contribution of GSTP1 to GSH-conjugation of both QIs was highest at GSH-depleted conditions, while in absolute quantities a higher GSTP1-dependent increase of GSH conjugate formation was seen without BSO pre-treatment ( Figure 5 )