Calcium intake, when combined with sufficient vitamin D, a healthyand regular exercise may help promote healthy bones and joint comfort. Calcium and magnesium are delivered in citrate form, providing superior bioavailability. Includes boron citrate. Delicious natural blueberry flavour. Cal : Mag Berry Liquid + supports bone health with a combination of calcium and magnesium, plus boron and vitamins A, D and K. Calcium citrate is a form of calcium that is significantly better absorbed in postmenopausal women than calcium oxide. Magnesium citrate is a highly bioavailable form of magnesium that helps to promote optimal bone mineral density: in healthy young men, regular magnesium supplementation has been shown to suppress bone turnover rates. Sufficient vitamin K intake may also help promote bone health.