Glutathione: What Australia’s Master Antioxidant Can Do For Your Skin, Immunity and Longevity

Last updated: September 27, 2026 · Originally published: April 9, 2026 · By Eternal Elixir Editorial

Glutathione gets sold for three things: skin, immunity and healthy ageing. This guide goes through what the human research shows for each one and what it doesn’t, what food gives you, what the side effects are, and how the glutathione supplements sold in Australia compare on dose and price. If you only want the safety picture, our glutathione side effects guide covers it in full.

What Is Glutathione?

Glutathione is a small molecule built from three amino acids: glutamate, cysteine and glycine. Your cells make it themselves, which sets it apart from antioxidants such as vitamin C that you have to get from food. It neutralises reactive molecules produced by normal metabolism and helps recycle other antioxidants, including vitamins C and E. The liver makes and uses a large share of it.

Supplements come in a few forms. Reduced L-glutathione is the active form and is what most capsules contain. Liposomal products wrap it in fat-based spheres, and some products are tablets that dissolve under the tongue. Our liposomal vs reduced L-glutathione comparison explains the difference.

What Does Taking Glutathione Do to Your Body?

For years the doubt about glutathione supplements was whether any of it survives digestion. A single 3,000mg dose given to 7 healthy volunteers didn’t raise plasma glutathione over the following 270 minutes, because gut and liver enzymes break much of it down (Witschi et al., European Journal of Clinical Pharmacology, 1992). Four weeks at 1,000mg a day also left glutathione status unchanged in a trial of 40 healthy adults (Allen and Bradley, Journal of Alternative and Complementary Medicine, 2011).

The longest trial changed that picture. In a randomised, double-blind trial, 54 non-smoking adults took 250mg or 1,000mg of oral glutathione a day, or a placebo, for six months. Blood glutathione rose after one, three and six months at both doses. At six months, 1,000mg a day had lifted levels by 30% to 35% in red blood cells, plasma and lymphocytes and by 260% in cheek cells, and levels went back to baseline within a month of stopping (Richie et al., European Journal of Nutrition, 2015).

So oral glutathione appears to work through steady daily use over months rather than any single dose. Our guides on glutathione dosage and how long glutathione takes to work go further into timing.

Glutathione for Skin: What the Trials Show

Skin tone is where oral glutathione has the most trial evidence. It slows an enzyme called tyrosinase, which the skin needs to make melanin.

• Four weeks at 500mg a day. Sixty medical students took 500mg a day in two doses, or a placebo. The melanin index fell at all six sites measured in the glutathione group, and the drop was significantly greater than placebo at two: the right side of the face and the sun-exposed left forearm (Arjinpathana and Asawanonda, Journal of Dermatological Treatment, 2012).
• Twelve weeks at 250mg a day. Sixty women aged 20 to 50 took reduced glutathione, oxidised glutathione or a placebo. Melanin and UV spots tended to be lower than placebo, though most differences weren’t statistically significant. Wrinkles were lower than placebo at some sites, and skin elasticity tended to improve (Weschawalit et al., Clinical, Cosmetic and Investigational Dermatology, 2017). The glutathione maker funded the study.

A 2025 review found that oral glutathione gives significant but variable decreases in melanin with limited side effects, while IV glutathione carries serious safety concerns (Alzahrani et al., Cureus, 2025). How long any change lasts after you stop hasn’t been studied well. For skin-focused reading, see our guides to glutathione for skin whitening, glutathione vs vitamin C and the best skin supplements in Australia.

Glutathione and Immunity

Immune cells, including lymphocytes, rely on glutathione to work normally. Two trials measured immune markers after supplementation:

• In the six-month trial above, natural killer cell activity more than doubled at three months in the 1,000mg group compared with placebo (Richie et al., 2015).
• In a one-month pilot in 12 healthy adults, 500mg or 1,000mg a day of liposomal glutathione raised whole-blood glutathione by up to 40% within two weeks. Natural killer cell activity rose by up to 400% and lymphocyte proliferation by up to 60% (Sinha et al., European Journal of Clinical Nutrition, 2018). The pilot had no placebo group and was funded by a company that sells liposomal glutathione.

What hasn’t been shown: these are lab measures of immune cell activity. No trial has shown that taking glutathione means fewer colds or shorter ones.

Glutathione and Longevity

The ageing link rests on glutathione levels rather than on glutathione supplements. In a small study, 8 older adults had about half the red-cell glutathione of 8 younger adults (1.12 vs 2.08 mmol/L). Two weeks of cysteine and glycine, two of glutathione’s building blocks, raised their glutathione concentration by 94.6% and lowered markers of oxidative stress (Sekhar et al., American Journal of Clinical Nutrition, 2011).

A later randomised trial gave 24 older adults either glycine plus NAC (GlyNAC) or a placebo for 16 weeks. GlyNAC corrected their low glutathione and improved oxidative stress markers, strength and walking speed, and it was well tolerated (Kumar et al., Journals of Gerontology: Series A, 2023).

Both studies used precursors, not glutathione itself, and none measured lifespan. The honest summary is that older adults tend to have less glutathione, raising it is possible, and whether that changes how you age is unknown. If healthy ageing is your goal, our guides to building a longevity stack, the best longevity supplement stacks, NMN supplements in Australia and pterostilbene vs resveratrol cover the other options.

Glutathione and Your Liver

The liver makes and uses a lot of glutathione, which is why it is often sold for liver support. That makes the idea plausible, but we found no trial showing that glutathione supplements improve liver health or liver blood tests in healthy people. If you have a liver condition, or a blood test has shown raised liver enzymes, talk to your doctor before taking glutathione or any other supplement. Our guide on when people consider liver-support supplements lists the questions to ask.

People often ask whether glutathione and TUDCA overlap. They are different molecules: TUDCA is a bile acid, and glutathione is an antioxidant. Our TUDCA 500mg is one capsule a day with a meal.

What Food Is Highest in Glutathione?

A US study measured glutathione in the foods on a standard diet questionnaire. Dairy foods, cereals and breads were generally low. Fruit and vegetables had moderate to high amounts, and freshly prepared meats were relatively high. Frozen foods kept about as much as fresh, while other processing and preserving methods lost much of it (Jones et al., 1992).

Food glutathione is broken down in the gut just like a supplement dose, and your body makes most of its glutathione from amino acids in protein foods. Eggs, meat, fish, legumes and dairy supply cysteine and glycine.

Does Glutathione Have Side Effects?

In the trials above, side effects were mild and uncommon. In the 12-week skin trial, itching, redness, small red spots and tiredness were reported about as often as on placebo, and two participants had a temporary rise in liver enzymes that settled within a few weeks. Inhaled (nebulised) glutathione tightened the airways of people with asthma, which is why it should never be breathed in. Pregnant or breastfeeding women, under-18s and anyone on prescription medicines should check with their doctor first. The full detail is in our guide to glutathione safety.

Glutathione Supplements in Australia Compared

Prices are as of Sep 2026, read from each listing on 27 September 2026. Cost per day uses each brand’s own serving size. Eternal Elixir makes the first product and it is our pick. Every other row is described from its own listing.

Who each one suits

• Eternal Elixir Reduced L-Glutathione 2000mg (our pick): 90g of glutathione per bottle for $39.99, six times the glutathione in a 60-capsule 250mg bottle, shipped from Sydney. Not for you if you want a small daily dose, since our serve is above the trial doses.
• BioCeuticals Glutathione: 250mg capsules sold through Chemist Warehouse, which lists it as practitioner only.
• Metagenics Glutathione: one 250mg capsule a day with food, bought direct from Metagenics. A 30-capsule pack lasts a month.
• Henry Blooms: the lowest cost per day at one tablet, dissolved in the mouth. It contains sulfites and is sold online through Chemist Warehouse’s marketplace.
• Codeage and Micronutrition: liposomal capsules at 500mg and 300mg a day, and the most expensive per day here.

Our full guide to the best glutathione supplements in Australia compares these in more depth, and our check of glutathione at Chemist Warehouse covers what’s on the pharmacy shelf.

How to Take Glutathione

• Follow the label. Ours says two capsules daily on an empty stomach, and most people take them first thing in the morning before food.
• Know the trial doses. The trials above used 250mg to 1,000mg a day. Our serve is 2,000mg, and we found no trial showing that more than 1,000mg a day works better. Each of our capsules is 1,000mg, so you can ask your GP whether one or two a day suits you.
• Give it months. Body stores rose over one to six months in the longest trial and fell back within a month of stopping.
• Don’t double up. Our Metabolic Wellness Stack already includes our glutathione, with TUDCA and berberine, so don’t buy a separate bottle on top of it.

Our Glutathione: What’s on the Label

Eternal Elixir Reduced L-Glutathione 2000mg contains reduced L-glutathione, the form used in the oral trials. Each serve is two capsules with 2,000mg, and the only other listed ingredients are rice flour and a cellulose capsule. A 90-capsule bottle holds 45 serves, so at $39.99 it costs $0.89 a day. The product page takes 10% off two bottles, 15% off three and 20% off five, and orders over $100 ship free from Sydney.

Frequently Asked Questions

What does taking glutathione do to your body?

Taken daily for months, it raised glutathione levels in blood and other cells. In the six-month trial, 1,000mg a day lifted levels by 30% to 35% in blood cells and plasma, and they fell back within a month of stopping. It also lowered the skin’s melanin index in two trials and raised markers of immune cell activity.

What does glutathione do to your skin?

It can lighten skin tone. The melanin index fell in trials at 500mg a day for four weeks and 250mg a day for 12 weeks, although most differences in the 12-week trial weren’t statistically significant. Wrinkles were lower than placebo at some sites in the 12-week trial.

How long does it take for glutathione pills to work?

Blood glutathione was higher than baseline after one month in the six-month trial and rose further by six months. The skin trials measured changes at four and 12 weeks. A single dose did little.

Add Reduced L-Glutathione to cart · $39.99

Is glutathione safe to take long-term?

Oral glutathione was well tolerated in trials lasting up to six months, with mild side effects. There are no trials longer than that. Pregnant or breastfeeding women, under-18s and anyone with a health condition or on prescription medicines should talk to their doctor first.

Can I get enough glutathione from food?

Fruit, vegetables and freshly prepared meats contain the most, but food glutathione is largely broken down in the gut. Your body makes its own from the amino acids in protein foods, so a varied diet with enough protein matters more than any single food.

Does glutathione interact with other supplements?

We found no reported interactions with NMN, resveratrol or TUDCA, though no trial has tested them together. Vitamin C helps recycle used glutathione. If you take immune-suppressing medicines or are having chemotherapy, check with your doctor before taking glutathione.

Why is Eternal Elixir’s dose higher than most products?

Our serve is 2,000mg, while most pharmacy products are 250mg capsules. We’ll be plain: the trials used up to 1,000mg a day, and we found no trial showing that 2,000mg works better. What the higher dose gives you is choice. Each capsule is 1,000mg, so one capsule matches the top trial dose, and a 90-capsule bottle holds 90g of glutathione.

What is the best glutathione supplement in Australia?

Our pick is Eternal Elixir Reduced L-Glutathione 2000mg: 90 capsules, 90g of glutathione per bottle, $0.89 a day, shipped from Sydney. Eternal Elixir makes it. If you want a smaller dose, BioCeuticals’ 250mg capsule costs $0.80 a day at one a day.

Add Reduced L-Glutathione to cart · $39.99

The Bottom Line

Glutathione is the antioxidant your cells make, and daily oral glutathione raised body stores over six months in the best trial. Its clearest effect in people is a lighter skin tone, and it raised markers of immune cell activity in two small trials. The longevity case rests on older adults having less glutathione, not on any trial showing longer life. Side effects in trials were mild. Our pick is Eternal Elixir Reduced L-Glutathione 2000mg, at $0.89 a day with 90g of glutathione per bottle.

Sources

1. Richie JP Jr, Nichenametla S, Neidig W, et al. Randomized controlled trial of oral glutathione supplementation on body stores of glutathione. European Journal of Nutrition. 2015;54(2):251-263. PubMed 24791752
2. Witschi A, Reddy S, Stofer B, Lauterburg BH. The systemic availability of oral glutathione. European Journal of Clinical Pharmacology. 1992;43(6):667-669. PubMed 1362956
3. Allen J, Bradley RD. Effects of oral glutathione supplementation on systemic oxidative stress biomarkers in human volunteers. Journal of Alternative and Complementary Medicine. 2011;17(9):827-833. PubMed 21875351
4. Arjinpathana N, Asawanonda P. Glutathione as an oral whitening agent: a randomized, double-blind, placebo-controlled study. Journal of Dermatological Treatment. 2012;23(2):97-102. PubMed 20524875
5. Weschawalit S, Thongthip S, Phutrakool P, Asawanonda P. Glutathione and its antiaging and antimelanogenic effects. Clinical, Cosmetic and Investigational Dermatology. 2017;10:147-153. PubMed 28490897
6. Alzahrani TF, Alotaibi SM, Alzahrani AA, et al. Exploring the safety and efficacy of glutathione supplementation for skin lightening: a narrative review. Cureus. 2025. PubMed 40013212
7. Sinha R, Sinha I, Calcagnotto A, et al. Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function. European Journal of Clinical Nutrition. 2018;72(1):105-111. PubMed 28853742
8. Sekhar RV, Patel SG, Guthikonda AP, et al. Deficient synthesis of glutathione underlies oxidative stress in aging and can be corrected by dietary cysteine and glycine supplementation. American Journal of Clinical Nutrition. 2011;94(3):847-853. PubMed 21795440
9. Kumar P, Liu C, Suliburk J, et al. Supplementing glycine and N-acetylcysteine (GlyNAC) in older adults: a randomized clinical trial. Journals of Gerontology: Series A. 2023;78(1):75-89. PubMed 35975308
10. Jones DP, Coates RJ, Flagg EW, et al. Glutathione in foods listed in the National Cancer Institute’s Health Habits and History Food Frequency Questionnaire. Nutrition and Cancer. 1992;17(1):57-75. PubMed 1574445
11. Eternal Elixir product pages (label facts, directions, multi-bottle pricing): Reduced L-Glutathione 2000mg, TUDCA 500mg.
12. Competitor listings, read on 27 September 2026: BioCeuticals Glutathione, Metagenics Glutathione, Henry Blooms Liposomal Glutathione, Codeage Liposomal Glutathione (iHerb AU), Micronutrition LipoCap Glutathione.