is glutathione testing routine like cholesterol or vitamin d Understanding Glutathione: How to Choose the Best Form for Your Health – Village Green Apothecary Oxidative Stress and Heart Disease:

Recently, glutathione injections have become a popular treatment for brightening the skin and boosting the immune system

NOAEL, the highest dose level that does not cause significant adverse effects, is a typical index for safety obtained from proper animal experiments to determine a safe starting dose.[7] In step 2, the NOAELs value is converted to HED on the basis of the body surface area correction factor (i.e., W 0.67 , which depends on the animal weight), using appropriate scaling factors from animal species.[11] Table 1 summarizes the factors for converting doses

Plaza-Daz J, Sols-Urra P, Rodrguez-Rodrguez F, Olivares-Arancibia J, Navarro-Oliveros M, Abada-Molina F, lvarez-Mercado AI

It's worth a try, especially if you are after Vitamin C's skin-brightening effects

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