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L-Glutathione is a tripeptide and one of the primary intracellular antioxidants. It is studied for its role in redox balance, detoxification pathways, and cellular protection against oxidative stress, functioning as the cell's main low-molecular-weight thiol buffer.
Characterized in the early 20th century and studied extensively by Meister and others, glutathione is among the most abundant low-molecular-weight thiols in living cells and has been a long-standing subject of redox biology. Decades of work established its central place in antioxidant defense and detoxification, making it a reference molecule for thiol chemistry.
L-Glutathione has been studied in cellular and systemic models for reactive-oxygen-species buffering, glutathione-S-transferase detoxification, and thiol-redox signaling. Its thiol group is what ties together its antioxidant, detoxification, and signaling roles, since the same chemistry that neutralizes reactive species also drives conjugation and redox regulation. As the dominant intracellular thiol, it functions as a baseline reference for studies of oxidative stress and cellular protection.
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