glutathione composed of is the master antioxidant, present in the body at the same concentration as cholesterol. It detoxifies and reduces inflammation and protects the organs from oxidative stress. Glutathione levels go down as What is Glutathione? – GoldBio

So, thats partly it, I think

1 Introduction Research on the use of traditional Chinese medicine, including single herbs, classical prescriptions, and isolated bioactive compounds for the prevention and treatment of central nervous system (CNS) disorders has been conducted for several decades

Key Point 4 B-complex vitamins play a crucial role in energy metabolism, helping to combat fatigue and increase vitality

1MD Nutritions N-Acetyl Cysteine (NAC) is scientifically formulated to provide antioxidant & normal detoxification support.* As a dietary supplement, NAC promotes the natural balance of glutathione levels in healthy adults.* Glutathione is a critical antioxidant in the body, promoting the bodys healthy response against common oxidative stress to maintain healthy cells and tissues.* NAC offers broad-spectrum benefits to maintain optimal overall health and support the immune, respiratory, liver, kidney, and antioxidant systems.*

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Molecular Basis of Disease, Elsevier 1739 , 525, doi:10.1016/j.bbadis.2004.08.004 (2004)