Mixing and storage

Add 3 mL of bacteriostatic water to a 600 mg vial, which gives 200 mg in each mL, so 200 mg is 100 units. For a 1500 mg vial, add 7.5 mL for the same strength. Swirl gently, never shake, because glutathione oxidises. Keep powder cool and dark. After mixing, keep it in the fridge and use it within 14 days, since mixed glutathione slowly loses strength.