Advanced Calcium Complex with Vitamins D3 and K2, Zinc and Boron which provides scientifically researched, highly absorbable key bone-supportive nutrients. Solgar Ultimate Bone Support contains a unique blend comprising amino acid chelates, citrates and malates, which ensure that these minerals are easy to absorb and utilised by all age groups and by those with compromised digestion. Whilst calcium is the most abundant mineral in bones, its utilisation is dependent on two key nutrients, Vitamins D and K. Vitamin K2 helps promote the incorporation of calcium into the bone matrix, as well as preventing calcium being deposited in artery walls.