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This review aims to discuss the benefits of GSH for the body and clarify the distinctions between dietary intake, endogenous synthesis, and supplementation as strategies for maintaining optimal GSH levels. Results: All studies show that GSH is a powerful antioxidant that plays a crucial role in maintaining various physiological processes in the body. It offers several benefits, primarily through its antioxidant properties and involvement in detoxification and immune regulation. This effect has potential implications for various health conditions associated with oxidative stress and inflammation, including neurodegenerative diseases, cardiovascular diseases, and metabolic disorders. Whether through diet or supplementation, ensuring adequate GSH levels can have profound benefits on longevity, immunity, and overall well-being. There are many foods known to contain GSH, and there are also many GSH supplements available on the market, but precursor-based supplements and compounds that activate GSH synthesis pathways show stronger and more consistent increases in human GSH. A diet rich in protein (for amino acids) and phytochemical-dense plants can support this, while targeted precursors (e.g., glycine, \u03b3-glutamylcysteine) and Nrf2-activating foods or agents provide the most robust increases shown so far. Such supplementation can be beneficial, and it is most effective when combined with a diet rich in sulfur-containing foods and other nutrients that support GSH synthesis.<\/jats:p>","DOI":"10.3390\/nu18101640","type":"journal-article","created":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T13:53:24Z","timestamp":1779371604000},"page":"1640","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Glutathione in Our Diet and Its Role in the Body: From Disease Prevention to Anti-Aging"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1869-0807","authenticated-orcid":false,"given":"Vijol\u0117","family":"Bradauskien\u0117","sequence":"first","affiliation":[{"name":"Department of Computer Science and Biotechnology, Klaip\u0117dos valstybin\u0117 kolegija\/Higher Education Institution, Bijunu Street 10, LT-91223 Klaipeda, Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1058-0569","authenticated-orcid":false,"given":"Elena","family":"Mo\u0161\u010denkova","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Biotechnology, Klaip\u0117dos valstybin\u0117 kolegija\/Higher Education Institution, Bijunu Street 10, LT-91223 Klaipeda, Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gra\u017eina","family":"\u0160niepien\u0117","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Biotechnology, Klaip\u0117dos valstybin\u0117 kolegija\/Higher Education Institution, Bijunu Street 10, LT-91223 Klaipeda, Lithuania"},{"name":"Faculty of Health Sciences, Klaip\u0117da University, Herkaus Manto Street 84, LT-92294 Klaipeda, Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0982-9539","authenticated-orcid":false,"given":"Reda","family":"Kubili\u016bt\u0117","sequence":"additional","affiliation":[{"name":"Faculty of Health Sciences, Klaip\u0117da University, Herkaus Manto Street 84, LT-92294 Klaipeda, Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lina","family":"Vai\u010diulyt\u0117","sequence":"additional","affiliation":[{"name":"Food Institute, Kaunas University of Technology, Radvilenu Road 19C-413, LT-50254 Kaunas, Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,5,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Chai, Y.C., and Mieyal, J.J. 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