50ml. 25 Servings. Magnesium is an essential mineral and is necessary for supporting normal heart function, nerve impulse transmission, muscle relaxation and calcium management. Symptoms of deficiency include: muscle tiredness, stress and anxiety, tension and fatigue. Skybright’s Magnesium Liquid Mineral is 100% bioavailable – it is not necessary to take large doses in order for the mineral to be effective. It’s easy to swallow and gentle on the stomach. For more information, see The many roles of Magnesium on our Resources page. Adult Dosage: Take 30 drops (2ml) daily in 250ml of juice or water. Take between meals for better absorption. Active Ingredients: Each 2ml contains: Magnesium Chloride 200mg, Purified Water.