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1. Detoxification Metabolism: The "Core Carrier" for Eliminating Liver Toxins

During the process of hepatic detoxification, glutathione binds to toxins—such as acetaldehyde (a metabolite of alcohol), pharmaceutical intermediates, and heavy metal ions—via its sulfhydryl groups (-SH). This interaction forms water-soluble complexes that are subsequently excreted from the body through bile or urine, thereby preventing the accumulation of toxins within liver cells.

2. Combating Oxidative Stress: Breaking the Chain of Hepatic Oxidative Damage

Hypermetabolism in the liver generates large quantities of reactive oxygen species (ROS), which attack hepatocyte cell membranes, DNA, and mitochondria. This triggers lipid peroxidation—characterized by the accumulation of malondialdehyde (MDA)—and ultimately leads to hepatocyte apoptosis. The antioxidant effects of glutathione are manifested in two ways:

(1) Direct scavenging of ROS: Through the GSH-GSSG cycle, it converts substances such as H₂O₂ and hydroxyl radicals into harmless compounds, thereby interrupting the "ROS – lipid peroxidation – hepatocyte necrosis" cascade;

(2) Activation of the antioxidant enzyme system: Acting as a coenzyme for glutathione peroxidase (GSH-Px) and glutathione transferase (GST), it enhances enzymatic activity (GSH-Px activity can be boosted by 58%), thereby fortifying the liver's antioxidant defense network. In models of non-alcoholic fatty liver disease, GSH supplementation has been shown to reduce hepatic MDA levels by 49%, increase SOD activity by 63%, and mitigate the severity of hepatocyte steatosis by 52%.

3. Cellular Repair: Maintaining the Functional Integrity of Hepatocytes

Glutathione protects the sulfhydryl groups of key enzymes within hepatocytes—such as alanine aminotransferase (ALT) and aspartate aminotransferase (AST)—from oxidation, thereby maintaining their metabolic activity. Concurrently, it promotes hepatocyte proliferation and repair while reducing hepatocyte apoptosis. Clinical data indicate that following glutathione supplementation in patients with chronic hepatitis, the rate of hepatocyte apoptosis decreases by 41%; ALT and AST levels decline by 38% and 43%, respectively; and the expression levels of hepatic inflammatory factors (TNF-α and IL-6) are reduced by over 50%, thereby effectively delaying the progression of liver fibrosis.