Like B12 shots, oral supplements are generally safe (4), even if you take more than the recommended 2.4 pg/mL per day
Another study 4 found the same benefits for adolescents, as well as alleviation of anxiety
Mitsui, S., Saito, M., Mori, K
It catalyzes the first step of glutathione synthesis, which consumes one molecule of ATP and combines glutamate and cysteine to form -glutamylcysteine (-Glu-Cys)
Its a vicious cycle: poor digestion leads to nutrient deficiency, which leads to lower glutathione, which leads to more inflammation, which further damages digestion
It's found in two forms, reduced glutathione (GSH) and oxidized glutathione (GSSG)