Calcium intake, when combined with sufficient vitamin D, a healthy diet, and 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.