Total Glutathione Test
This page explains the total glutathione test, what it measures, and how to arrange it. A total glutathione test measures the amount of glutathione in your blood. Glutathione is an antioxidant made by your body that helps protect cells from damage. It is ordered mainly in wellness or research settings to look at oxidative stress, not to diagnose a specific disease.
- Sample type
- blood
- Category
- General Wellness
- Turnaround
- 1-3 business days
- Price
- $145
- Referral
- Not required
A total glutathione test measures the amount of glutathione in your blood. Glutathione is an antioxidant made by your body that helps protect cells from damage. It is ordered mainly in wellness or research settings to look at oxidative stress, not to diagnose a specific disease.
What it measures
- Total glutathione — The combined amount of reduced and oxidized glutathione in your sample.
- Reduced glutathione (GSH) — The active form that neutralizes harmful molecules called free radicals.
- Oxidized glutathione (GSSG) — The used-up form, created after glutathione does its antioxidant work.
- GSH/GSSG ratio — A calculated comparison that can suggest how much oxidative stress is present.
Who it is for
This test is usually ordered by a clinician or researcher exploring antioxidant status, oxidative stress, or general wellness. It is not a routine screening test.
Preparation
No fasting is usually required. Tell the person drawing your blood about any supplements, especially glutathione or N-acetylcysteine, since they can affect results.
Results and what they mean
Results are reported as a concentration in your blood, often with a reference range from the testing lab. Your clinician interprets the number alongside your history, symptoms, and other tests. This is general information, not medical advice; talk with a qualified clinician about your results.
How to order this test
- Choose the test and place a confidential order online.
- Select a certified collection site and pick a time that suits you.
- Have your specimen collected — most draws take only a few minutes.
- Review results in a secure portal, typically within 1–3 days.
Preparation, hours, and pricing vary by site; confirm details directly with the lab before your visit.
Availability by state
Direct-access online ordering for the total glutathione test is available in most states. It is currently unavailable in 6 states:
Everywhere else you can order confidentially and collect your sample at a certified site. Browse by state →
Frequently asked questions
Do I need to fast?
Typically no. Follow any instructions your ordering clinician gives you.
Can food or supplements change my level?
Yes. Diet and supplements such as glutathione or N-acetylcysteine may affect results, so report them before testing.
Is a low result a diagnosis?
No. A low value is a lab finding, not a diagnosis. Only a clinician can interpret it in context.
How soon will I get results?
Turnaround is usually 1 to 3 business days after the sample reaches the lab.