THE MOST PREFERRED FORM OF VITAMIN D Vitamin D3 helps to increase and maintain vitamin D levels in your body. VITAMIN D3 contributes to the normal absorption/use of calcium and phosphorus - blood calcium level - protection of bones - protection of muscle function - protection of teeth - normal function of the immune system. Vitamin D also plays a role in cell division. It ensures adequate circulation of vitamin D in the body. Ministry of Agriculture and Forestry Approved Food Supplement Containing Vitamin D3. Contains 1000 IU vitamin D in each capsule.