How Glutathione Works

Glutathione is a naturally occurring tripeptide produced in every cell, with its highest concentrations found in the liver. Often dubbed the “master antioxidant,” it plays a central role in maintaining cellular redox balance, neutralizing harmful free radicals, and facilitating phase II liver detoxification:

• Direct Free Radical Scavenging: Glutathione possesses an active sulfhydryl ($-text{SH}$) group on its cysteine residue, which acts as a direct electron donor. This enables it to neutralize reactive oxygen species (ROS), peroxides, and lipid radicals before they cause structural damage to DNA, proteins, and cell membranes.

• Cellular Detoxification: It serves as a key substrate for the enzyme glutathione S-transferase (GST), binding directly to heavy metals, environmental toxins, and lipid peroxides to transform them into water-soluble compounds that can be safely excreted.

• Mitochondrial & Immune Support: By recycling other essential antioxidants (such as Vitamins C and E) back into their active forms, glutathione maintains mitochondrial efficiency and protects immune cells from oxidative degradation during metabolic stress.

• Inhibition of Melanogenesis: In dermatological models, glutathione influences skin pigmentation pathways by inhibiting the tyrosinase enzyme and shifting melanin synthesis from dark (eumelanin) to lighter (pheomelanin) pigments, leading to significant interest in skin-lightening research.

Chemical Properties