Designed to optimise nutrient synergy, vitamin D supports the normal absorption and utilisation of calcium, helping you maintain normal calcium levels and bone structure. With 800 mg of calcium, 400 mg of magnesium, 10 mg of zinc, 1 mg of copper, and 400 IU of vitamin D3, the formula is designed to optimise nutrient synergy - most notably, vitamin D contributes to the normal absorption and utilisation of calcium.