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Notably, NAC supplementation even to older animals decreased the lifespan (Fig

50 & Target IC50: GSH [1] In Vitro Glutathione ethyl ester (5 mM) reduces the intracellular reactive oxygen species (ROS) content, promotes meiotic progression, increases the proportion of oocytes with mature cytoplasm (evenly dispersed cortical granules), and improves the normal fertilization rate, blastocyst development rate, and the proportion of diploid blastocysts when treating oocytes from aged cows [1]

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The body attempts to overcome this limitation via the transsulfuration pathway in the liver, which converts the amino acid methionine into cysteine to ensure a steady supply for glutathione synthesis