Glutathione studies use different amounts for different formulations and endpoints. Oral trials have studied 250 or 1,000 mg per day; a small intravenous Parkinson's disease trial studied 1,400 mg three times weekly. These are study regimens, not one interchangeable dosage range for oral, IV and subcutaneous products.
Glutathione doses actually studied in people
| Formulation and route | Studied amount and duration | Participants and endpoint | What the result establishes |
|---|---|---|---|
| Oral glutathione | 250 or 1,000 mg daily for six months | 54 non-smoking adults; glutathione levels in several body compartments | Levels increased during supplementation and returned toward baseline after washout. The trial measured glutathione stores, not a general treatment outcome. Richie et al., 2015 |
| Oral liposomal glutathione | 500 or 1,000 mg daily for four weeks | 12 healthy adults; glutathione levels and selected biomarkers | A small pilot found increases in glutathione levels. Its size limited comparisons between doses. Sinha et al., 2018 |
| Intravenous glutathione | 1,400 mg three times weekly for four weeks | 21 people with Parkinson's disease; clinical rating scores | The pilot did not demonstrate a statistically significant clinical improvement over placebo. Hauser et al., 2009 |
Why oral and injection doses cannot be substituted
A dose is the amount administered. A concentration is the amount per volume, usually mg/mL for a liquid. Route and formulation affect how a study's amount should be interpreted. The oral studies above do not establish a subcutaneous injection frequency or a conversion from an oral amount to an injected amount.
The earlier version of this guide presented 200-400 mg subcutaneous schedules and a week-by-week escalation as established protocols. The cited studies do not substantiate those schedules, so this revision does not retain them as dosing recommendations.
Reading a concentration without confusing it with a dose
For a liquid with a stated concentration, amount in mg equals volume in mL multiplied by concentration in mg/mL. This arithmetic describes the contents of a measured volume; it does not identify an effective regimen. Syringe markings, liquid concentration and medication amount are separate quantities.
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Compare the actual formulation, route, participant population, duration and outcome. An increase in blood glutathione is a biochemical result. It is not automatically evidence for a skin outcome, athletic recovery, detoxification or treatment of another condition. A trial's higher study amount also does not prove that it works better for a different goal.
Frequently asked questions
Is there one standard glutathione dose?
The studies above do not establish one dose that applies across oral, IV and subcutaneous formulations. Each tested a particular product and outcome.
Does the six-month oral study prove injection benefits?
No. It investigated oral supplementation and glutathione stores. It did not compare injection schedules.
How quickly do the studies report changes?
The oral trial measured levels over six months, while the liposomal pilot assessed four weeks. Biomarker measurements are not a promised timeline for visible or symptomatic results.
Related guides
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Disclaimer: This article is for informational purposes only and doesn't constitute medical advice. Glutathione therapy isn't FDA-approved for any medical condition. The dosage information presented here is drawn from clinical research and shouldn't be used as a substitute for professional medical guidance. Always consult with a licensed healthcare provider before beginning any therapy. Individual results may vary. FormBlends doesn't claim that glutathione cures, treats, or prevents any disease.
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