Yes, refrigerating an opened vial at 2 to 8C is acceptable and will not damage it
Once absorbed, the acetyl group is removed, allowing glutathione to function within cells
Smilkstein MJ, Knapp GL, Kulig KW, Rumack BH: Efficacy of oral N-acetylcysteine in the treatment of acetaminophen overdose
That said, these supplements are best thought of as tools for symptom support, not solutions for underlying medical conditions
Glutathione fights free radicals, which are pesky molecules that cause cellular damage and lead to adverse chemical reactions in your body
Glutathione Injections: Common Side Effects Similar to many cosmetic treatments, glutathione injections can yield various side effects, ranging from mild to severe, depending on the dosage