Glutathione Peroxidases in Plants: Innumerable Role in Abiotic Stress Tolerance and Plant Development Journal of Plant Growth Regulation Springer Nature Link Glutathione, often dubbed the master antioxidant plays a crucial role in detoxification, immune function, and protecting our cells from oxidative stress. Here are some signs that your levels might be low: Persistent Glutathione is nicknamed the master antioxidant because it is the most abundant, body produced (endogenous) antioxidant found in every cell, essential for neutralizing free radicals, recycling other antioxidants (like Vitamin C and E), What Is Reduced Glutathione? Benefits, Sources & Uses