APP and psychotic disorder: Specifically, supplementation with N‐acetyl cysteine (NAC) has been shown to (1) increase GSH levels by providing cysteine, the rate limiting compound in GSH synthesis71; (2) protect cells from amyloid beta–induced apoptosis71; and (3) improve cognition in the senescence‐accelerated mouse‐prone 8 (SAMP8) model, overexpressing the amyloid precursor protein (APP) gene,71 and in human psychosis.72