Gastroenterology 2019
L-Theanine: 100-300 mg L-theanine is a non-essential amino acid responsible for much of the calming effects of tea, particularly green tea
Thailand Studies VIP analogues have found that it plays a crucial role in supporting the human digestive tract
In accordance with other extracts from natural products, 7 days of a Sasa veitchii (Carrire) Rehder leaf extract (0.2 ml per day) pretreatment significantly decreased hepatic injury markers, including ALT and AST, oxidative stresses, including malondialdehyde and glutathione, histologic damages, inflammatory cytokines, activation of JNK, receptor-interacting protein-1, which has emerged as a key modulator of necrotic cell death, and CYP2E1, whereas the total antioxidant capacity within the liver was increased in an acute APAP mice model (550 mg/kg) (Zhang et al., 2014
Some other factors like illnesses, chronic colds, pollution, smoking and inflammatory conditions also lead to excessive usage of glutathione and hence, its depletion
Mahn A, Castillo A