glutathione transferase assay Sensitive S-transferase based on Fe-doped hollow carbon nanospheres with oxidase-like activity transferase levels within a range of 2 to 80 U/L Glutathione S-transferase - Wikipedia
Description
As for how long to use it, Melasma HQ Cream is not meant to be a long-term maintenance product

Researchers have found that systemic sclerosis-related PAH patients also exhibit lower serum levels and activity of GPX3 than healthy controls [109]

These effects do not appear overnight

The texture of this lotion is non-sticky and absorbs quickly which, in a body lotion, is what I love as I don't like my clothing sticking to me

With its potent antioxidant properties, it helps to protect cells from oxidative stress, promoting overall wellness

Glutathione, often referred to as the body's master antioxidant, is found in every cell and is crucial for combating oxidative stress, detoxifying harmful substances, and maintaining cellular health