In addition to cysteine, neurons can utilize the cysteine donors such as CysGly, GluCys, and N-acetylcystein (NAC) as precursors for glutathione
The efficacy of Hypericum perforatum (St Johns wort) for the treatment of premenstrual syndrome: a randomized, double-blind, placebo-controlled trial
Garvey WT, Frias JP, Jastreboff AM, le Roux CW, Sattar N, Aizenberg D, et al
In a randomized, double-blind, placebo-controlled pilot trial published in Movement Disorders (2009) by Hauser and colleagues (21 patients), intravenous glutathione at 1,400 mg three times weekly was well tolerated with no withdrawals due to adverse events, although it did not produce statistically significant efficacy differences versus placebo