All of these action steps are important, but some may make a larger dent in the bucket than others
Schakman O, Gilson H, de Coninck V, Lause P, Verniers J, Havaux X,
Here's the TL;DR on vitamin timing: while there is no official medical advice dictating that you should take vitamin supplements at a specific time of day to improve their efficiency, there is quite a lot of research showing that avoiding some vitamin supplements at particular times (or more accurately, with particular meals) can improve absorption, or that taking some vitamins alongside food can reduce the risk of adverse side effects
GSH is a cysteine-containing tripeptide that functions as an intracellular antioxidant, and its production is mainly dependent on the uptake of cystine and the conversion of cystine to cysteine, which is mediated by the amino acid reverse transport system SLC7A11 [18]