glutathione used a supplement has caused some people massive damage Injections: Side Effects & Benefits Vitamin C and glutathione supplementation:

An mGlu5-positive allosteric modulator rescues the neuroplasticity deficits in a genetic model of NMDA receptor hypofunction in schizophrenia

[331,489] found L-kynurenine and KYNA among the metabolites most raised in terms of predicting both the severity of the disease and poor outcome (implying activation upstream of L-kynurenine as well as of KAT enzymes or transporters)

While these phrases are common, they can be misunderstood as a pre-mixed product

References Pocernich CB, Butterfield DA (2012) Elevation of glutathione as a therapeutic strategy in Alzheimer disease

Nethravathy, V., Athhar, A., and Mosok, U.G., Asian J