When your liver processes alcohol, it produces free radicals. These increase oxidative stress and use up glutathione, the main antioxidant your cells make.
In people who drink heavily over time, studies have measured much lower glutathione levels in the blood and the lungs. No supplement makes up for those effects: what does reduce them is drinking less.
Key takeaways
- Metabolizing alcohol produces reactive oxygen species, mainly in the liver.
- In people with chronic alcoholism, plasma glutathione was almost half that of healthy controls (small study, 10 people).
- In the fluid that lines the lungs, the difference was about sevenfold.
- Chronic drinking is also linked to low zinc, a mineral tied to antioxidant defense.
- These data come from chronic drinking. No study shows that taking glutathione protects against the effects of alcohol.
A drink with friends is a common social ritual. For your liver, though, it marks the start of a long shift of chemical work. Understanding what happens there helps explain why glutathione matters so much, and why no supplement can do that work for you.
What is glutathione, the antioxidant your body makes on its own?
Glutathione is a molecule made of three amino acids: cysteine, glycine, and glutamic acid. Your cells make it themselves.
It is one of the body’s most important antioxidants. Its secret is a sulfur atom (the thiol group of cysteine) that can donate electrons to free radicals and neutralize them. It also helps the liver process substances, and the liver is where glutathione is most concentrated.
What happens in your liver after a drink?
Your liver processes most of the alcohol you drink. The main pathway is an enzyme called alcohol dehydrogenase (ADH), which turns ethanol into acetaldehyde, a toxic substance that is then converted into acetate.
When people drink a lot or often, the liver also switches on a backup pathway: the cytochrome P450 enzymes, especially one called CYP2E1. According to a review from the U.S. National Institute on Alcohol Abuse and Alcoholism (NIAAA), these pathways generate reactive oxygen species (ROS), and alcohol also lowers antioxidant levels [1].
The result is an imbalance: more free radicals and fewer defenses to neutralize them. That is called oxidative stress. To learn more about glutathione’s role in this organ, read Glutathione and Your Liver.
What do human studies show?
Two classic studies measured glutathione in people with chronic heavy drinking.
In the blood. Lauterburg and Velez (1988) compared 5 people with chronic alcoholism and no liver disease with 5 healthy volunteers. Plasma glutathione was 4.35 µM versus 8.48 µM: almost half [2].
In the lungs. Moss and colleagues (2000) analyzed the fluid that lines the air sacs. In people with chronic alcoholism, median glutathione was 79 µM, compared with 576 µM in controls. A larger share was also oxidized, a sign it was being “used up” [3].
Both studies are small and observational. They show an association, not cause and effect. Most important, they looked at people with chronic, heavy drinking, not at people who drink occasionally.
Alcohol and zinc: another nutrient affected
Zinc is part of antioxidant enzymes and supports the normal function of many cells.
According to the NIH Office of Dietary Supplements, 30% to 50% of people with alcoholism have low zinc levels. Ethanol reduces how much zinc the gut absorbs and increases how much is lost in urine, and diet is often limited as well [4].
A review in the European Journal of Nutrition goes further: it proposes that low zinc drives part of the alcohol-related damage in the liver, lungs, gut, and brain [5]. It is a hypothesis based on human and animal studies, not a settled conclusion.
Alcohol and acetaminophen: a combination that calls for caution
The liver uses glutathione to process a byproduct of acetaminophen (paracetamol). That is why the 1988 researchers suggested that low glutathione could be a risk factor for acetaminophen-related liver damage in people who drink heavily [2].
If you drink regularly, talk to your doctor before taking acetaminophen or other pain relievers. No supplement replaces that conversation.
Does taking glutathione “cancel out” alcohol?
No. No study shows that taking glutathione protects against the effects of alcohol.
The glutathione studies done in healthy people did not include drinkers. One of them, a 4-week randomized trial of 500 mg of oral glutathione twice a day, found no change in oxidative stress markers [6]. That result shows the limits of the oral route, but it says nothing about alcohol.
No supplement replaces the benefits of cutting back or quitting.
If you want to cut back, the SAMHSA National Helpline (U.S.) is free, confidential, and available in English and Spanish: 1-800-662-4357.
What if you also smoke?
Cigarette smoke is another major source of free radicals. Smoking and drinking together add up to a double load of oxidative stress. We will cover this in detail in an upcoming article on glutathione in smokers.
What the studies say
None of these studies used GlutaDose®. All of them measured glutathione or zinc in people or reviewed the research.
| Study | Type and participants | Main finding | Limitation |
|---|---|---|---|
| Wu and Cederbaum, 2003 [1] | Review (NIAAA) | Alcohol metabolism generates ROS and lowers antioxidants | Narrative review, no new data |
| Lauterburg and Velez, 1988 [2] | Comparison: 5 people with chronic alcoholism vs. 5 controls | Plasma glutathione 4.35 vs. 8.48 µM | Very small sample; chronic drinking only |
| Moss et al., 2000 [3] | Case-control with bronchoalveolar lavage | Lung glutathione 79 vs. 576 µM (medians) | Observational; chronic alcoholism only |
| NIH ODS [4] | Official fact sheet | 30% to 50% of people with alcoholism have low zinc | Summarizes studies; not a study itself |
| Skalny et al., 2018 [5] | Review | Proposes that low zinc drives part of alcohol’s damage | Hypothesis; mixes human and animal evidence |
| Allen and Bradley, 2011 [6] | Randomized placebo-controlled trial: 40 healthy adults, 4 weeks | 1 g/day of oral glutathione, no change in oxidative stress markers | Did not include drinkers; oral, not sublingual |
Where does GlutaDose® Wellness fit in?
GlutaDose® Wellness is not an antidote or a shield against alcohol. It is a daily supplement that supports the body’s natural antioxidant defense as part of a healthy lifestyle:
- Helps maintain healthy immune function*
- Supports healthy cell function*
- Increases body energy, reducing fatigue*
Each 10 mL vial contains 780 mg of a proprietary blend of L-glutathione and acerola extract (a source of vitamin C), plus 10 mg of zinc. You take it sublingually, a route that, in one study of glutathione, raised blood levels more than swallowing it [7]. We explain why in Sublingual vs. Liposomal Glutathione.
How to use: 1 vial every morning on an empty stomach. Hold the liquid under your tongue for 10–15 seconds, then swallow.
Zero sugar, vegan, free of gluten, soy, and dairy. Made in the USA in an FDA-registered, GMP-certified facility. Discover GlutaDose® Wellness
Frequently asked questions
Does alcohol lower glutathione?
In people with chronic drinking, studies have measured lower levels. One study found almost half the glutathione in plasma, and another about seven times less in lung fluid. These are small, observational studies, and there are no comparable data on occasional or moderate drinking.
Can I take glutathione for a hangover?
No study shows that glutathione relieves or prevents hangovers. GlutaDose® is not designed for that. A hangover depends on how much you drink, how hydrated you are, and how well you rest. The most reliable way to avoid one is to drink less or not at all.
Does GlutaDose® protect the liver from alcohol?
No. No supplement protects the liver from alcohol or cancels out its effects. GlutaDose® Wellness supports the body’s normal antioxidant defense as part of a healthy lifestyle. If you are concerned about your liver, talk to your doctor and consider cutting back.
Can I combine GlutaDose® with alcohol or medications?
If you take prescription medications or drink regularly, talk to your doctor before using any supplement, including GlutaDose®. This is especially important with pain relievers such as acetaminophen, which the liver processes using glutathione.
Conclusion
Alcohol increases oxidative stress and, with chronic drinking, is linked to lower glutathione and lower zinc. Science describes this, but it has not shown that taking glutathione reverses it. Caring for your antioxidant defenses starts with drinking less; a supplement like GlutaDose® Wellness can be part of a healthy lifestyle, never a substitute.
Scientific references
- Wu D, Cederbaum AI. Alcohol, oxidative stress, and free radical damage. Alcohol Res Health. 2003;27(4):277–284. Review. PMC6668865
- Lauterburg BH, Velez ME. Glutathione deficiency in alcoholics: risk factor for paracetamol hepatotoxicity. Gut. 1988;29(9):1153–1157. n = 10. PubMed 3197987
- Moss M, Guidot DM, Wong-Lambertina M, Ten Hoor T, Perez RL, Brown LAS. The effects of chronic alcohol abuse on pulmonary glutathione homeostasis. Am J Respir Crit Care Med. 2000;161(2):414–419. Case-control. PubMed 10673179
- NIH Office of Dietary Supplements. Zinc: Fact Sheet for Health Professionals. ods.od.nih.gov
- Skalny AV, Skalnaya MG, Grabeklis AR, Skalnaya AA, Tinkov AA. Zinc deficiency as a mediator of toxic effects of alcohol abuse. Eur J Nutr. 2018;57(7):2313–2322. Review. DOI 10.1007/s00394-017-1584-y
- Allen J, Bradley RD. Effects of oral glutathione supplementation on systemic oxidative stress biomarkers in human volunteers. J Altern Complement Med. 2011;17(9):827–833. Randomized trial, n = 40. PubMed 21875351
- Schmitt B, Vicenzi M, Garrel C, Denis FM. Effects of N-acetylcysteine, oral glutathione (GSH) and a novel sublingual form of GSH on oxidative stress markers: a comparative crossover study. Redox Biol. 2015;6:198–205. Crossover study, n = 20. PMC4536296
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Not recommended during pregnancy or breastfeeding. Talk to your doctor before use if you have an autoimmune disorder, have had a transplant, have an acute infection, or take prescription medications, including immunosuppressants. Stop use 1 week before any surgery. This article is for information only and does not replace medical advice.