Glutathione Supplements: Comparing Ingredients, Formats and Price

By Your Health Magazine Contributor

Your Health Magazine Contributor

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Glutathione Supplements: Comparing Ingredients, Formats and Price

Glutathione is one of the body’s main antioxidants, and the supplement aisle offers several ways to support glutathione levels. Some products contain glutathione itself, while others provide building blocks the body uses to produce it.

This guide compares six options for U.S. adults, looking at what each label lists, how the product is taken and what a typical pack costs. Prices and label details were checked in November 2026.

Key Takeaways

• Glutathione supplements generally fall into two groups: direct glutathione and precursors that the body can use in glutathione production.
• Gamma-glutamylcysteine, or GGC, is an immediate precursor to glutathione.
• NAC supplies cysteine, which the body uses earlier in the glutathione-production pathway.
• Direct glutathione products are available in capsules and liquids, while precursor products are also available in capsules and powders.
• Milligram amounts should not be compared directly across NAC, GGC and glutathione because they are different compounds.

Direct Glutathione vs. Precursors

Glutathione is made from three amino acids in a two-step process. The first step joins glutamate and cysteine to form GGC, and the second step adds glycine to complete the glutathione molecule.

Direct supplements provide the finished molecule. Precursor supplements provide an earlier building block instead. GGC is the immediate precursor, while N-acetylcysteine, or NAC, supplies cysteine for the first step.

Research has examined both approaches. A randomized human pilot study published in Redox Biology found that single oral doses of 2 g and 4 g of GGC increased glutathione inside white blood cells.

Because these ingredients act at different points in the pathway, their milligram amounts cannot be compared directly.

Comparing the Products

The products below differ in active ingredient, serving size, format, added ingredients, testing and price. This is a comparison of publicly available product information rather than a clinical evaluation or hands-on product test.

Prices can change, so current product pages should be checked before purchasing.

Continual-G

ContinualG uses Glyteine, a proprietary form of GGC. Because GGC is the immediate precursor to glutathione, the body requires one additional step to produce glutathione from it.

The product is offered in two formats. Capsules provide 400 mg of Glyteine per capsule, while lemon-lime powder sachets provide 415 mg and also contain Sunfiber, a soluble prebiotic fiber.

The company also lists its products under the Informed Sport testing program.

The 60-capsule package was listed at $125.99 when checked. A 60-sachet package showed a $100 sale price, down from $125.99. Powder directions call for one sachet in the morning and one in the evening.

The main distinction is the choice between a capsule and drink-mix format while using GGC as the active glutathione precursor.

Thorne Glutathione-SR

Thorne Glutathione-SR provides 175 mg of reduced glutathione per capsule in a sustained-release format.

The U.S. product carries an NSF Certified for Sport listing and is labeled gluten-free, dairy-free and soy-free.

Directions call for one capsule two to three times daily. A 60-capsule bottle was listed at $54, which means the bottle lasts approximately 20 to 30 days when used according to those directions.

The sustained-release format is a product characteristic, but it should not be assumed to produce better health outcomes than other glutathione formulations solely because of the delivery method.

Jarrow Formulas Glutathione Reduced

Jarrow Formulas provides 500 mg of glutathione per capsule without additional herbs or fiber ingredients.

Directions call for one capsule daily with a meal. The label also lists exclusions for several common allergens, including gluten, soy, dairy, egg, nuts and sesame.

The brand page displayed a price of $39.99 with multiple bottle sizes available. Consumers should confirm the capsule count when comparing prices between retailers or package sizes.

This is one of the more straightforward options for people comparing direct glutathione capsules without additional active ingredients.

NOW Foods Glutathione 500 mg

NOW Foods combines 500 mg of reduced glutathione with 100 mg of milk thistle extract and 50 mg of alpha lipoic acid per capsule.

The label recommends one capsule daily, preferably on an empty stomach.

Prices checked were $23.99 for 30 capsules, $43.99 for 60 and $77.99 for 120 capsules.

Because this product contains additional active ingredients, people taking medications or managing medical conditions should review the full ingredient list and discuss potential interactions with a healthcare professional.

Quicksilver Scientific Liposomal Glutathione

Quicksilver Scientific offers glutathione in a liquid liposomal format.

A two-pump, 1 mL serving provides 100 mg of glutathione and 75 mg of phosphatidylcholine. The product is available in lemon-mint and cacao-mint flavors.

The bottle requires refrigeration after arrival and is labeled for use within 30 days of opening.

A 50 mL bottle was listed at $45. Although the bottle contains approximately 50 servings, the recommended storage period after opening may affect how much of the product can realistically be used.

Liposomal delivery is marketed as an absorption-focused format, but the format alone does not establish superior health outcomes.

Life Extension N-Acetyl-L-Cysteine

Life Extension provides 600 mg of NAC per capsule.

NAC differs from both direct glutathione and GGC because it supplies cysteine, which the body uses earlier in the glutathione-production pathway.

A 60-capsule bottle was listed at $11.25. Directions allow one capsule one to three times daily, so the bottle can last from approximately 20 to 60 days depending on use.

People considering NAC should also review potential interactions and other safety considerations. YHM’s guide to NAC supplement risks provides additional information.

How to Choose a Glutathione Supplement Format

Start by looking at the active ingredient.

Direct glutathione products provide glutathione itself. GGC provides the immediate precursor used in the final step of glutathione production, while NAC supplies cysteine earlier in the pathway.

Next, consider the format. Capsules may be convenient for people who already take supplements in pill form. Powders provide an alternative for people who prefer drinks, while liquids may be useful for people who have difficulty swallowing capsules.

Added ingredients also matter. Some products contain glutathione alone, while others combine it with ingredients such as milk thistle, alpha lipoic acid, fiber or phosphatidylcholine.

Finally, calculate cost based on the labeled daily directions rather than simply comparing bottle prices or capsule counts.

What the Evidence Can and Cannot Tell You

Glutathione plays an important role in normal antioxidant processes in the body, but supplement formulation alone does not establish that a particular product will provide a meaningful health benefit for an individual.

Research on oral glutathione, GGC and NAC varies by ingredient, dose and population. Findings from one formulation or precursor should not automatically be applied to another.

Dietary supplements are also not approved by the FDA for safety and effectiveness before being marketed.

Anyone taking medication, managing a health condition, or who is pregnant or breastfeeding should discuss supplementation with a physician or pharmacist.

The Bottom Line

Glutathione supplements come in several forms, and the products described here use different approaches.

Continual-G provides the immediate precursor GGC in capsule and powder formats. Thorne, Jarrow and NOW provide direct glutathione capsules, while Quicksilver Scientific offers a liquid formulation. Life Extension provides NAC, an earlier precursor in the glutathione-production pathway.

Rather than treating one product as universally superior, compare the active ingredient, serving size, formulation, directions, added ingredients and daily cost.

Frequently Asked Questions

What is the difference between glutathione and a glutathione precursor?

Direct supplements contain glutathione itself. Precursors such as GGC and NAC provide compounds the body can use during glutathione production.

Is GGC the same as NAC?

No. NAC supplies cysteine, which the body uses in the first step of glutathione production. GGC is produced after that first step and is the immediate precursor used to make glutathione.

Can I compare glutathione supplements by milligrams?

Only when comparing the same ingredient. NAC, GGC and glutathione are different compounds, so their milligram amounts are not directly equivalent.

Should I talk to a doctor before taking a glutathione supplement?

People taking medication, managing a medical condition, or who are pregnant or breastfeeding should discuss supplements with a healthcare professional. A doctor or pharmacist can also help determine whether supplementation is appropriate.