Magnesium Oxide - MgO (240mg elemental magnesium x 60 Caps @ 1.2 cent per mg)South Africas Most Cost Effective Magnesium Supplement They will never tell you that Magnesium Oxide (MgO) is the best value magnesium supplement in South Africa. Each capsule delivers 240 mg of elemental magnesiummore than any other form, gram for gram, ensuring maximum absorption and benefits for your body. See below the amounts of elemental magnesium in other compounds like magnesium glycinate. Why Magnesium Is Essential Magnesium supports over 300