It is broadly defined as a combination of several possible symptoms: anorexia (lack of appetite), nausea, unexplained vomiting, abdominal distention, constipation, reflux and epigastric pain, and occasionally intestinal paralysis
Heres some more specifics on where glutathione functions in your body Immune system Health Glutathione enhances immune cell function by promoting the appropriate proliferation, activation, and differentiation of immune cells, such as lymphocytes and macrophages (Drge & Breitkreutz, 2000)
Gabery S, Glendorf T, Ballarin-Gonzalez B, Pedersen K, Kruse T, Raun K, Kuhre RE
The injection guide covers syringe selection in more detail