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 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 5 Common Mistakes to Avoid While Using Glutathione in Skincare Rainbow Candy Customized Flavor Glutathione Skin Whitening Oral Dissolving Strip Film Rapid Absorption 300mg Safe Antioxidant Alibaba.com Glutathione 60 Quick Dissolving Tablets Nutrameltz