Oral glutathione has been everyone on my timeline but does it actually work?! Looking at the data, its very modest to be honest. Id recommend sticking to what we know works fo hyperpigmentation in What Is Glutathione? Health Benefits, Risks, and More Glutathione Intravenous Use: FDA Warning and Risks Glutathione IV Therapy: Timeline for Skin Lightening Glutathione Injections Side Effects: Everything You Need to Know Credihealth