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Without the natural ligand for the GHSR1a in many parts of the brain, the various roles of this receptor centrally remain uncertain

L-glutamine is a precursor of glutathione and is key to health due to its role in cellular energy, immune function, and the maintenance of the intestinal lining

The activation of NRF2 by this mechanism enhances the transcription of genes involved in antioxidant defense and cystine/glutamate exchange, particularly those coding for components of the xCT antiporter (such as SLC7A11), which imports cystine in exchange for glutamate

De novo biosynthesis of GSH is controlled by the rate-limiting enzyme, glutamate-cysteine ligase (GCL, also known as -glutamylcysteine synthetase, -GCS) which consists of a catalytic (heavy) ( -GCSh) and a regulatory (light) subunit ( -GCSl)