Glutathione is a tripeptide composed of three amino acids: cysteine, glutamic acid, and glycine. It is naturally produced in the liver and is present in virtually all cells of the body. Often referred to as the 'master antioxidant,' glutathione plays a critical role in protecting cells from oxidative damage caused by free radicals and reactive oxygen species. Beyond its antioxidant function, it is also involved in various metabolic processes, including detoxification, immune system modulation, and DNA repair. The body's ability to produce glutathione can be influenced by diet, environmental toxins, stress, and aging. Levels can also be depleted by certain health conditions and medications. While the body produces glutathione endogenously, it can also be obtained through diet or supplementation. However, the bioavailability of orally ingested glutathione can be limited due to enzymatic breakdown in the digestive tract, a factor that has led to research into different forms of supplementation.
Deep dive
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Known interactions
Compound-pair rule
Note
NAC is a glutathione precursor, so combining overlaps in the same antioxidant pathway.
Not harmful, but partly redundant.
Category rule: glp1 × supplement
Note
GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.
Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider.
Category rule: supplement × medication
Note
Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).
Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Frequently asked
Sources referenced
- National Institutes of Health (NIH) Office of Dietary Supplements (ODS)
- MedlinePlus (National Library of Medicine)
- PubChem (National Center for Biotechnology Information)
- Mayo Clinic
- Examine.com
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician.
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