I recommend full-fat raw dairy from grass-fed milk that naturally contains whey protein to boost glutathione levels since heat and cooking can destroy the cysteine
Lets get straight to the heart of the matter
New Phytol 208:860872 Kovacs I, Holzmeister C, Wirtz M, Geerlof A, Frhlich T, Rmling G, Kuruthukulangarakoola GT, Linster E, Hell R, Arnold GJ, Durner J, Lindermayr C (2016) ROS-mediated inhibition of S-nitrosoglutathione reductase contributes to the activation of antioxidative mechanisms
Many companies use soy-based lecithin because it is cheap
Um, lets see
Functional complementation of anthocyanin sequestration in the vacuole by widely [PMID: 9668133] Laboratory literature summary: Functional complementation of anthocyanin sequestration in the vacuole by widely divergent glutathione S-transferases