there is not enough scientific data to prove their safety
Biochimica et Biophysica Acta (BBA) - General Subjects
Thus, glutathione is an essential part of the way cells balance ROS on a constant basis, as well as being available in situations where oxidative stress is generated by toxins, disease, or other pathological conditions.[ref] Glutathione peroxidase (GPX1, GPX2,3,4) antioxidant in cells Glutathione S-transferases (GSTs) are a family of enzymes that bind glutathione to toxic substances to remove them from the cell and then out of the body
Free radicals are highly reactive and can cause oxidative stress, which has been linked to various chronic diseases, such as cardiovascular diseases, certain cancers, and age-related macular degeneration [20]
NAD+ benefits build up slowly and stay longer