No.5 Glutathione C Facial Spa Cleansing Oil Your glutathione vial is not a bad batch. Glutathione dissolves at 20 to 50 mg mL. When you add 2mL of water to a 600mg vial, that is 300 mg mL. The powder physically Glutathione will not dissolve : r PeptideDiscussion Amazon.com: KAL L Glutathione, Reduced Glutathione Supplement, High Absorption Antioxidant, Orange Flavor Instant Dissolve ActivMelt, Vegetarian, Lab Verified, 90 Servings, 90 Micro Tablets : Health & Household L Glutathione 500mg