The Power Of Glutathione: What Exactly Is Glutathione?
Immune Health

The Power Of Glutathione: What Exactly Is Glutathione?

Antioxidants like glutathione protect your body from harmful byproducts of metabolism, toxins, environmental pollutants, and other threats. Glutathione is naturally produced in the liver and nerve cells in the brain and spinal cord. It is a small peptide made up of glycine, L-cysteine, and L-glutamate.

What Does Glutathione Do To The Body?

Glutathione is found in all your body tissues and has many important benefits for your health, including:

  • Supporting immune function
  • Detoxifying chemicals, pollutants, and drugs
  • Regulating cell division and death
  • Supporting DNA production and repair
  • Protecting your body from oxidative stress
  • Neutralizing free radicals
  • Lowering inflammation
foods high in anti-oxidants

What Are The Symptoms Of Low Glutathione?

Glutathione is created naturally in our body through three processes:1,2

  • De novo synthesis, which is making glutathione from its precursor amino acids: L-cysteine, glycine, and L-glutamate
  • Recycling of reduced glutathione (GSH) by glutathione reductase, alternating between accepting and donating electrons
  • The reuse of cysteine to form glutathione via gamma-glutamyl transferase

Glutathione levels in your body cells will inevitably decrease as you age, and the stresses of everyday life can lead to a glutathione deficit even faster.3 Glutathione deficit is common. To fill this gap, many people opt for glutathione supplements.

Symptoms associated with low glutathione levels include:

  • Weight gain
  • Male infertility
  • Fatigue
  • Frequent infections
  • Skin damage
  • Joint and muscle aches

Is Glutathione Safe For Everyone To Take?

There is not enough research on glutathione dosages, the effects of overdosage, or stopping glutathione. Despite being generally recognized as safe, glutathione may cause side effects. It is possible that glutathione injections may lead to the following:4

  • Nausea and vomiting: Glutathione injections can cause stomach upset and vomiting.
  • Allergic reactions: If you are allergic to glutathione or any of its components, you may develop a rash, have difficulty breathing, and have swelling of the face, tongue, throat, or lips.
  • Blood clotting problems: Glutathione injections may interfere with blood clotting, increasing the risk of bleeding and bruising. A long-term phase 4 study has not found an increased bleeding risk after using glutathione.
  • Rash or irritation at the injection site: Irritation from the medication or preservatives can cause redness, pain, or swelling.
  • Kidney and liver problems: Excessive glutathione consumption may result in kidney or liver dysfunction.

Glutathione supplementation has not been adequately studied for its potential side effects in people who are pregnant or breastfeeding. If you supplement with glutathione long-term, ask about getting your zinc levels checked. Prolonged glutathione supplement use has been associated with decreased zinc levels.5 Oysters are rich in zinc. Red meat, poultry, legumes, nuts, and dairy products are excellent sources of zinc.

foods and supplements in boosting antioxidants

What Food Is Highest In Glutathione?

Consuming glutathione-rich foods and having it readily available for your body tissues to use is challenging because it is digested in the intestine, hard to absorb through the intestines, and metabolized in the liver. However, consuming nutritious foods high in glutathione’s precursor amino acids is a great way to give your body the leucine, L-glutamate, and L-cysteine it needs to produce glutathione naturally.

Foods high in glutathione or its precursor amino acids include:

  • Poultry
  • Beef
  • Chicken
  • Pork
  • Fish
  • Eggs
  • Low-fat yogurt
  • Cheese
  • Seeds and nuts

Overall, people consume plenty of glutathione in their diets. In one study, participants had a mean daily glutathione intake of 34.8mg, ranging from 13 to 109.9mg. Fruits and vegetables contributed over 50% of the usual dietary glutathione intake, whereas meats contributed less than 25%. However, the amount of glutathione consumed in the diet does not directly correlate with the amount available in body tissues because much of it is metabolized before it can be used.

Correlations between dietary and tissue Glutathione were higher in people with elevated levels of vitamin C, suggesting that glutathione and vitamin C rich foods should be consumed together.6   Like glutathione, vitamin C is an antioxidant. Supplementing with it can help conserve glutathione. Selenium is a glutathione cofactor and an essential mineral. It can also help enhance glutathione function.

Glutathione has numerous health benefits, as evidenced by its clinical use. If you have any questions about glutathione or are unsure whether it is right for you, please get in touch with one of the treatment specialists at Invigor Medical.

Looking to buy glutathione online? See how Invigor Medical can help you today!


While we strive to always provide accurate, current, and safe advice in all of our articles and guides, it’s important to stress that they are no substitute for medical advice from a doctor or healthcare provider. You should always consult a practicing professional who can diagnose your specific case. The content we’ve included in this guide is merely meant to be informational and does not constitute medical advice.


  1. Pizzorno J. Glutathione! Integr Med (Encinitas). 2014 Feb;13(1):8-12. PMID: 26770075; PMCID: PMC4684116.
  2. Noctor G, Queval G, Mhamdi A, Chaouch S, Foyer CH. Glutathione. Arabidopsis Book. 2011;9:e0142. doi: 10.1199/tab.0142. Epub 2011 Feb 18. PMID: 22303267; PMCID: PMC3267239.
  3. Lang CA, Naryshkin S, Schneider DL, Mills BJ, Lindeman RD. Low blood glutathione levels in healthy aging adults. J Lab Clin Med. 1992 Nov;120(5):720-5. PMID: 1431500.
  4. Weschawalit S, Thongthip S, Phutrakool P, Asawanonda P. Glutathione and its antiaging and antimelanogenic effects. Clin Cosmet Investig Dermatol. 2017;10:147-153
  5. Steiger MG, Patzschke A, Holz C et al. Impact of glutathione metabolism on zinc homeostasis in Saccharomyces cerevisiae, FEMS Yeast Research, Volume 17, Issue 4, June 2017, fox028,
  6. Flagg EW, Coates RJ, Eley JW, Jones DP, Gunter EW, Byers TE, Block GS, Greenberg RS. Dietary glutathione intake in humans and the relationship between intake and plasma total glutathione level. Nutr Cancer. 1994;21(1):33-46. doi: 10.1080/01635589409514302. PMID: 8183721.
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Published: Mar 25, 2023


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