This is a liver and antioxidant formula built around 500mg of **Glutathione**, but absorption is the catch: it uses the reduced form, which your gut largely breaks down into amino acids before it reaches your cells. Glutathione is the body's master antioxidant and a driver of liver detoxification, and 500mg falls within the 250–1,000mg range used in research — but those trials relied on forms designed to survive digestion. Swallowing standard reduced glutathione is an inefficient way to actually raise your levels; taking NAC, its direct precursor, is a more dependable route to the same goal.

**Milk Thistle** delivers 80mg of silymarin, its active fraction, below the roughly 150mg where most liver studies begin. **Alpha-Lipoic Acid** appears at 50mg, well under the 300–600mg used in trials — ALA does help regenerate glutathione, so it fits the formula's logic, but 50mg won't contribute much on its own.

The honest takeaway: every active here points at liver and antioxidant support, but the headline form absorbs poorly and the two supporting doses are too low to pull much weight. If raising glutathione is your actual goal, an NAC product will likely do more for you per capsule.

BioStacks
NOW

Glutathione 500 mg

1 Capsule · 30 servings

iHerbAmazon

Best for

Liver

Ingredients (3)

Glutathione

100%

Dose

500 mg

Target

250–1000 mg

Form

—

Milk Thistle extract

67%

Dose

100 mg

Target

150–600 mg

Form

Budget

Alpha Lipoic Acid

17%

Dose

50 mg

Target

300–600 mg

Form

Budget

Other Ingredients (4)

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

HypromelloseCapsule

Plant-derived capsule material from cellulose

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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