can glutathione injection whiten underarm IV Drip: Cost, Benefits, Procedure & Side Effects Glutathione for skin lightening: a
Description
Laboratory data showed that Oral S-Acetyl Glutathione increased intracellular glutathione and had a positive effect on many oxidative stress biomarkers.*

At 5 mg/mL, a 2.5 mg dose requires 0.50 mL, which equals 50 units on a U-100 insulin syringe
however, the 6-month changes in the younger sub-group of DG did not show any significant difference when compared to the 6-month changes in the younger sub-group of D as a result of GSH supplementation (Figure S5)

Others likely experience no difference

Experimental & Molecular Medicine 51 (2): 113

You can take it daily, continuously
