Best Glutathione Supplement | 4 Recommendations in 2026

Best Glutathione Supplement

We closely examine the role of the “master antioxidant” in the human body and identify the four best glutathione supplements on the market.

Dan is an editor and writer at Innerbody Research. After receiving his bachelor's degree in English from Piedmont University in 2008, he dedicated 11 years to writing and editing for curriculum development in South Korea before returning stateside to work as a copywriter.

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Photo by Innerbody Research

One thing a lot of supplement users have in common is the desire to live longer and be healthier. In surveys conducted by the National Center for Health Statistics, you'll find the most widely reported reasons for supplementation are to improve or maintain overall health and to target specific issues like heart health and age-related changes.1 If your motivations are similar, a single supplement to address several health concerns could be just the thing you want to streamline your regimen.

Glutathione may be one such supplement. Often referred to as the "master antioxidant," glutathione is a naturally occurring substance the human body needs to protect its cells from oxidative stress. As a supplement, it has low toxicity and a relatively high potential to safeguard you against harmful health outcomes to your brain, heart, and a host of other areas.15

Glutathione supplements should meet some basic parameters to be maximally beneficial, and not all of them clear the bar. In this guide, we discuss the four best glutathione supplements we've identified, assess their merits, and go deeper into the roles that glutathione plays in human health.

Check out our summary of recommendations for the quickest rundown. Then read further to understand how we reached our conclusions.

Summary of recommendations

Best for most people: Codeage Liposomal Glutathione

Best budget pick: Life Extension Glutathione

Best for liver support: Doctor's Best Glutathione + Milk Thistle

Best liquid form: Quicksilver Scientific Glutathione

Codeage’s glutathione shines thanks to ingredient quality and a commitment to safety and transparency.

Some research suggests that a dose of this branded glutathione is strong enough to be cut in half and still be effective. Liposomal delivery ensures maximum bioavailability of this supplement. Raw ingredients are tested for purity, and the final product is tested by third parties. Codeage’s glutathione is also free of gluten and soy, and it’s suitable for vegans. You can buy it directly from Codeage or from the company’s store on Amazon, but it’s better to buy direct; Amazon won’t accept returns for this, and you save more money by subscribing on Codeage.

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Why you should trust us

Over the past two decades, Innerbody Research has helped tens of millions of readers make more informed decisions about staying healthy and living healthier lifestyles.

Writing this guide to the best glutathione supplements started with comprehensive research on the subject of glutathione itself. Among other things, we sought to understand glutathione's role in the body, how it works, and what benefits it could impart as a supplement. Then we scoured the glutathione supplement market to identify products whose qualities aligned with what we'd found in our research. Those are the products we ordered and tried for ourselves.

Additionally, like all health-related content on this website, this guide was thoroughly vetted by one or more members of our Medical Review Board for accuracy and will continue to be monitored for updates by our editorial team.

How we evaluated the best glutathione supplements

Evaluating the market's best glutathione supplements involved five criteria related not only to the products themselves but also to the brands that make them:

Effectiveness

Safety

Cost

Ease of use

Customer service

Each of our recommendations had something to offer in each criterion, even when it didn't rise to the very top in the category.

Effectiveness

Winner: Codeage Liposomal Glutathione

By "most effective," we mean "most effective for most people." Codeage Liposomal Glutathione fits the bill because it provides a versatile dose of a branded glutathione through a delivery system found to increase bioavailability.

Codeage’s combined dosage and serving size hit a sweet spot in which it can provide the desired health outcomes while also giving room to titrate down as needed. Clinical studies on oral glutathione often use doses of 500-1,000mg — as in a four-week trial in 2011 and another in 20192 3 — but we know that effective doses have ranged as low as 250mg, like in a six-week trial of Setria (the same brand used in Codeage) in 2015.4 Because Codeage delivers 500mg of Setria across two capsules, you can take the lower dose if you’re concerned about the safety issues that may correspond with higher doses,5 or you can take the full recommended serving size if you’re not. Of course, our other recommendations also let you titrate as needed, but to potentially less effect.

Life Extension and Doctor's Best provide clinically relevant glutathione doses, but they lack Codeage’s liposomal delivery. Liposomal delivery entails encapsulating compounds in microscopic lipid particles to protect the active ingredient as it travels through the digestive tract. Therefore, it helps ensure that your body absorbs the maximum possible amount of glutathione.19 Because Life Extension and Doctor’s Best aren’t liposomal, less of their glutathione is likely to get into your system.

Quicksilver Scientific allows plenty of room for titration, but its base dose of 100mg is on the low side. Although its orobuccal route of administration (i.e., through the tissues lining the mouth) leads to greater absorption, even the lowest orobuccal dose used in studies is 50mg higher.22

Safety

Oral glutathione is generally safe for most people. If any side effects arise, they tend to be minor and temporary — itching, rash-like patches, tiredness, and transiently high liver enzyme levels. To approach toxic levels, a person would have to take around 32.5g of glutathione,6 which is over 64 times more than what you'd get with even the highest-dosed options among our recommendations.

For the most part, then, we have to look at a brand's manufacturing practices to determine the safety of its glutathione supplement, and for the following reasons, Codeage shines just a little brighter than the others on that front:

Raw ingredients testing

The raw ingredients that go into Codeage products undergo testing to ensure their safety.

Third-party testing of finished products

As for the testing of finished products, it goes through independent third parties to remove bias.

Soy-free, gluten-free, and vegan status

The company's glutathione is also soy-free, gluten-free, and vegan, so it's suitable for anyone for whom soy, gluten, and animal products are problematic.

Dosage

The fact that Codeage lets you titrate between two clinical doses (250mg and 500mg) with increased absorption potential gives you control over your personal safety risk while maximizing efficacy.

Truth be told, we had a tough time choosing the safety winner, as Life Extension and Quicksilver also perform strongly in terms of quality controls. Life Extension third-party tests its raw materials, too, and Quicksilver performs one of the largest allergy panels we've encountered. But after a point-by-point assessment, we determined that Codeage does more to accommodate a larger user population.

The only one of our recommendations that may present a higher risk for adverse effects is Doctor's Best Glutathione + Milk Thistle. Part of it has to do with its milk thistle, which has numerous drug-drug interactions and can cause anaphylaxis in people allergic to certain plant families. We discuss these matters in the product's dedicated section later in this guide.

Cost

Winner: Life Extension Glutathione

Even after you account for the shipping cost for non-subscription orders below $50, Life Extension Glutathione, at $23.25, is around $5 less than the second-most affordable glutathione supplement on our list (Doctor's Best) and more than $20 less than the most expensive (Quicksilver Scientific). And if you subscribe, the cost difference is even starker since the price drops to $18.68 and you get free shipping.

The per-serving cost is likewise the lowest on the list, as the table below illustrates. (The per-serving costs are for the label-recommended doses. Shipping costs are included where applicable.)

Life Extension

$0.96

$0.62

Doctor’s Best

$1.13

$1.08

Quicksilver Scientific

$1.50

$1.35

Codeage

$1.56

Doctor’s Best isn’t that much higher, so it remains a comparatively budget-conscious option for people who want additional liver support. The same could be said for Quicksilver Scientific if you feel the easier route of administration and higher overall serving volume are worth a little more up front.

Ease of use

Winner: Quicksilver Scientific Glutathione

Depending on what survey you look at, something like 10-40% of the population has trouble swallowing pills — a condition known as pill dysphagia.7 8 For them, no capsule is an easy go.

That's why Quicksilver Scientific Glutathione is our pick for the easiest-to-use glutathione product. It's a liquid supplement, so there's nothing to cause physical discomfort. You just administer 1mL, hold it in your mouth for a while, and then swallow.

Sure, it needs to be refrigerated, but the bottle is tiny and hardly takes up any shelf space. Also, the liquid is flavored, and the flavor may not appeal to everyone, but our testers rather liked it. One of them described the Cacao Mint flavor as "sort of a minty cereal."

Customer support

Winner: Life Extension

We had tough competition in this criterion, as nearly all of our top recommended glutathione brands demonstrated superb customer support. Life Extension pulled ahead of the others for three reasons:

Diverse modes of contact

Life Extension has three modes of contact with its support team: telephone, email, and online chat. The other brands were less diverse.

Faster response

Online chat is the fastest mode of contact when it works well, and Life Extension's chat function works well. We were connected with a representative within 10 seconds and had our answer within 30. Plus, the rep didn't waste time evading the answer, as many service reps do; they answered directly and satisfactorily, and we bid each other a good day.

Generous return policy

Life Extension’s 365-day return policy is one of the best in the supplements space, and we say “one of” only out of regard for any companies out there touting lifetime guarantees. The second-best return policy in this guide entails a 60-day window, which you’ll agree is significantly shorter than 365.

Codeage's and Quicksilver's teams were excellent in their own rights, providing responses within five and 90 minutes, respectively. Codeage did so through its online chat function, but it doesn’t seem to have a direct email line. Quicksilver’s answer came through email, but it lacks an online chat function.

The only company that was lacking in top-tier customer support was Doctor's Best. It took about 24 hours to receive the initial response, which only said that someone would get back to us at some point. We received a second response two days later saying that our question was transferred to another department. Finally, on day five, we received a definitive answer to our question. On the one hand, in terms of giving us accurate information, the team at Doctor's Best gave us their best, and we appreciate that. On the other hand, we wish the answer had come sooner.

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The best glutathione supplements at a glance

Here’s a quick side-by-side comparison of our top glutathione supplements in key consumer decision factors, including cost, serving quantity, and dosage. (Shipping and taxes are excluded.)

One-time $

$39.99

$23.25

$33.99

$45