Does oral glutathione cause skin lightening, and what dosage strength is appropriate? Brightening from Within: How Glutathione Naturally Reduces Hyperpigmen Setu Nutrition Glutathione is a powerful antioxidant often marketed for brighter, more even skin tone and reduction of dark spots from acne or sun damage. While oral glutathione may offer mild skin brightening Skin Lightening IV Therapy Glutathione in Beverly Hills & LA