Vitamin D3 1000 is your premium quality formula based on scientific evidence to support healthy maintenance of your bone, teeth & muscle health. Vitamin D3 is produced naturally by your body when your skin is exposed to regular sunlight, deficiencies may occur in modern lifestyles. Vitamin D3 promotes calcium absorption in your bones, supporting bone mineralisation and strength as you age and when dietary intake is inadequate. Formulated to support immune function and healthy aging.