glutathione found in How to increase levels: 4 natural ways Glutathione: Master Antioxidant, Reducing Oxidative
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A deficiency in vitamin B12 can lead to a specific set of neurologic disorders (subacute combined degeneration of the spinal cord, cognitive impairment) and one hematologic disorder (megaloblastic anemia) disorders

Neurons are particularly vulnerable to oxidative stress because of their high oxygen demand, abundance of unsaturated lipids and relatively low antioxidant capacity 83

Hasan Maleki M, Siri M, Jafarabadi A, Rajabi M, Amirhossein Mazhari S, Noori Z, et al

Fibroblasts synthesize extracellular matrix (ECM) components, glycoproteins, adhesion molecules, and a range of cytokines
