Glutathione

What this test is

Glutathione is a substance your body makes to help protect cells and support detoxification. Some clinics offer a blood test to check your glutathione level, often for fatigue or general wellness. There is no proven, well-studied way to use this blood test to guide your care. A low or high result does not point to a clear next step. This is different from many other blood tests, where a result changes what your doctor recommends. If you are feeling tired or run down, there are usually more useful things to look at first, like sleep, diet, stress, and other common causes.