Glutathione, a tripeptide naturally produced in the liver, is hailed as the body’s master antioxidant. Comprising three amino acids—cysteine, glutamic acid, and glycine—it plays a vital role in protecting cells from oxidative stress, the imbalance of free radicals. Its unique structure enables it to neutralize these radicals, preserving cellular integrity. Beyond antioxidation, glutathione supports detoxification, immune function, and DNA maintenance. While the body produces it, factors like aging and stress can affect its levels, prompting interest in methods to enhance glutathione, such as diet and supplementation. Understanding its multifaceted role highlights its crucial contribution to overall health.