In such conditions, the APX-MDHAR system could work largely as a closed cycle, with minimal or minor input from glutathione (Fig
Unlike the NADPH-specific GR, MDHAR can use NADH or NADPH (Hossain et al

However, cell damage can occur with insufficient amounts or improper functioning of this enzyme (if it becomes overwhelmed, for example, with excess GSSG).* Glutathione plays a role in most bodily processes.* Inadequate amounts can lead to many discomforts and potential health issues, lower glutathione levels may stem from genetic factors, diet, lifestyle, and age.* The following are several examples of glutathione's foundational roles in human health.* Low levels of glutathione have been linked with premature cell death, also called apoptosis, and higher levels are linked with longevity.* [2] When the body has enough glutathione, it can help to maintain energy levels, promote a healthy inflammatory response, support cognitive activity, and normalize metabolic functions.* The more glutathione the body has, the healthier your mitochondria and cells.* Antioxidants are best known for their healthy aging benefits, as they help to protect your body from oxidative stress, or free radical damage.* A certain amount of free radicals is unavoidable and normalthe body naturally produces energy and releases free radicals as byproducts of this process

J Bioremed Biodeg 4:187 Bian S, Jiang Y (2009) Reactive oxygen species, antioxidant enzyme activities and gene expression patterns in leaves and roots of Kentucky bluegrass in response to drought stress and recover