The system Xc- facilitates the transfer of extracellular cystine to intracellular glutamate in a 1:1 ratio, subsequently leading to the synthesis of GSH from intracellular cystine, supported by the functions of glutamatecysteine ligase (GCL) and glutathione (GSS) [64]
This is not a minor modulation
Again and again, regulators said they could find little data on safety or effectiveness and raised concerns about risks of contamination, allergic reactions and quality control
Pola, P., Tondi, P., Flore, R., Serricchio, M., Dal Lago, A., Amanti, C., Consorti, F., Benedetti, M., and Midiri, H
Persistently high results could signal a blood disorder, a malignancy or a problem with the liver or kidneys