Glutathione
What the trials found
Glutathione does not support broad health claims across outcomes; evidence is insufficient to establish a meaningful benefit for any specific supplement goal.
- 8 papers
- 0 of 29 outcomes
- 1 major interaction
Risk, worst reported severity
- acetaminophen major
Dose, timing & forms
How much
The available evidence summary does not include outcome-specific oral protocols that justify a universal glutathione dose. That matters because a broad set of consumer claims does not equal a proven milligram target. Choose a product only when its label and the clinical evidence for your specific goal clearly line up.
When and how long
The available information does not establish a best time of day, a food rule, or a split-dose routine for glutathione. Treat it as a planned daily supplement only if you and a qualified clinician have a clear reason to use it, rather than using it as an occasional response to stress, poor sleep, or a hard workout.
Forms & standardisation
Look for the ingredient stated clearly as glutathione or reduced glutathione, rather than relying on vague antioxidant-blend language. Glutathione is also called GSH in scientific and product contexts.1 The evidence summary does not identify one oral form or standardization marker as clearly best studied.
Adverse events and drug interactions
Drug interactions
Recommended Glutathione products
Real products that dose Glutathione where the research does, in a clean formulation, from brands we've audited. We only list ones we'd stand behind.
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Nootropics Depot
Reduced Glutathione
Well dosed 1,000 mg/day A formulaBrand audit 87/100
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Designs for Health
Glutathione Power
Well dosed 1 Gram(s)/day A formulaBrand audit 80/100
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Pure Encapsulations
Liposomal Glutathione
Well dosed 750 mg/day A formulaBrand audit 78/100
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Swanson
L-Glutathione 500 mg
Well dosed 500 mg/day A formulaBrand audit 69/100
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SuperSmart
Reduced Glutathione 1000 mg
Well dosed 1,000 mg/day A formulaBrand audit 63/100
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Thorne
Glutathione-SR
Well dosed 525 mg/day B formulaBrand audit 79/100
Chosen for adequate Glutathione dosing vs. the studied range, a clean formulation (grade A–C), and independent brand-quality audits. Not sponsored.
What this is and how it works
- Eight reviewed papers spanning 29 outcomes provide no supplied pooled effect estimate for a strongest outcome 1.
- Evidence spans multiple outcomes rather than one established population, dose, or product formulation.
- Biological antioxidant activity does not establish clinically meaningful benefits across marketed uses 1.
Glutathione acts in the cell's redox system, donating and receiving electrons as enzymes process reactive compounds.1 Picture a reusable oven mitt in a busy kitchen: it helps catch chemical heat, then gets restored so it can work again.1 That biology explains the interest in supplementation, but it does not automatically prove that swallowing a product changes a meaningful health outcome.
Bottom line
Glutathione makes biological sense as part of your cells' antioxidant defense network, but the evidence summary does not support treating it as a catch-all fix for the many outcomes marketed on supplement labels. It suits people who can match a specific product to credible evidence for a specific goal. If you use acetaminophen, check with a pharmacist or clinician before adding it.2
Common questions
What does glutathione do in the body?
Does oral glutathione raise glutathione levels?
Can I take glutathione with acetaminophen?
Sources
Sources
Generated August 27, 2026