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 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 L Glutathione 25 mg ActivMelt Instant Dissolve Tablets