Glutathione Levels Decline With Age, But Protein and Nutrients May Help
By cocosomers // 2026-09-28
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An article by Molly Knudsen, RDN, published Sept. 23 on Mindbodygreen.com, reports that glutathione, the most abundant antioxidant produced by the human body, declines with age, and that protein and targeted nutrients may help support the body's natural supply. According to the article, glutathione is a small molecule made from three amino acids: glutamate, cysteine, and glycine. Glutathione supports antioxidant and redox-balance functions, and its levels can change with age and other factors. The article is the latest addition to a body of independent reporting on glutathione. NaturalNews.com has described the molecule as the body's "master antioxidant," essential for detoxification, immune function, and disease prevention [1].

What Is Glutathione?

Glutathione is a small molecule with antioxidant properties that helps neutralize reactive compounds, according to the article. It also works alongside antioxidant enzymes, including glutathione peroxidase, to help remove peroxides from cells [15]. That activity helps limit oxidative damage to cell membranes, proteins, and DNA. Glutathione has become a subject of interest in the healthy-aging field because its levels appear to change as people get older. Proponents of natural health approaches have long argued that this decline is a modifiable factor in aging.

Study Links Lower Glutathione to Aging

A study of 169 healthy adults ages 20 to 94 found that adults ages 60 to 79 had blood glutathione levels 17% lower than adults ages 20 to 39, researchers reported. The researchers also found that low glutathione levels were more common among older participants, according to the article. A smaller study compared eight older adults with eight younger adults. Researchers found the older group had lower glutathione concentrations and lower glutathione synthesis rates, along with higher markers of oxidative stress and oxidant damage. After the older participants received the glutathione precursors cysteine and glycine for two weeks, their glutathione concentrations increased by nearly 95%, and several measures of oxidative stress and oxidant damage decreased. The findings align with other research on antioxidant defenses and aging. The Journal of Neuroscience Research reported changes in cerebral antioxidant enzymes, peroxidation, and the glutathione system in frogs after aging and catalase inhibition [6]. Other sources have linked low glutathione to broader health concerns. NaturalNews.com reported that deficiencies in glutathione may help explain why many people suffer from chronic health conditions such as heart disease, cancer, and neurodegenerative diseases, and that glutathione is produced from the amino acids glycine and glutamine [9].

How to Support Glutathione Levels

There is no established daily requirement for glutathione, according to the article. However, the article states that adequate protein intake from a variety of protein-rich foods provides the amino acid raw materials the body uses to make glutathione [15]. For a more targeted approach, look for a supplement that provides glutathione directly alongside nutrients involved in antioxidant defenses. Book sources support the dietary strategy. "Prescription for Nutritional Healing" notes that serine can be synthesized from glycine in the body but requires sufficient amounts of vitamins B3, B6, and folic acid, and that meat and soy foods are common sources [10]. "The Healthy Liver and Bowel Book" lists glycine, cysteine, vitamin C, vitamin E, and natural carotenoids among nutrients that support the liver's detoxification pathways [11]. The article advises pregnant, breastfeeding, or medication-taking individuals to consult a doctor before starting a supplement routine [15]. According to the article, the body's natural glutathione system can be supported through protein and key nutrients in the diet, with a targeted supplement as an option.

References

  1. Evangelyn Rodriguez. "The Master Antioxidant: How Glutathione Protects Health and How to Boost It Naturally". NaturalNews.com. October 20, 2025.
  2. Mercola.com. "Here's Why Glutathione Is Profoundly Beneficial for Your Body". Mercola.com. January 6, 2019.
  3. "The Gale Encyclopedia of Alternative Medicine, Second Edition".
  4. Robert A. Ronzio. "The Encyclopedia of Nutrition and Good Health".
  5. Mike Adams interview with Wil Spencer. August 25, 2023.
  6. "Changes on Cerebral Antioxidant Enzymes, Peroxidation, and the Glutathione System of Frogs After Aging and Catalase Inhibition". Journal of Neuroscience Research.
  7. "Developmental Patterns in the Antioxidant Defenses of the Housefly, Musca domestica". Journal of Cellular Physiology.
  8. "Effect of Methylglyoxal Modification and Phosphorylation on the Chaperone and Anti-Apoptotic Properties of Heat Shock Protein 27". Journal of Cellular Biochemistry.
  9. "Deficiencies in glutathione explain why many of us are suffering chronic health conditions". NaturalNews.com. August 29, 2018.
  10. Phyllis A. Balch. "Prescription for Nutritional Healing".
  11. Dr. Sandra Cabot. "Healthy Liver and Bowel Book: Detoxification Strategies for your Liver and Bowel".
  12. James DiNicolantonio and Siim Land. "The Mineral Fix: How to Optimize Your Mineral Intake for Energy, Longevity, Immunity, Sleep and More".
  13. Mike Adams. "Brighteon Broadcast News - BOMBS AWAY". Brighteon.com. May 6, 2025.
  14. Mike Adams. "Brighteon Broadcast News - Bombshell New Video Shows Shooter RUNNING". Brighteon.com. August 1, 2024.
  15. Molly Knudsen. "This Antioxidant Is Key For Healthy Aging - Are You Getting Enough?". Mindbodygreen.com. September 23, 2026.
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