Vitabiotics Ultra Vitamin D3 is a high-quality supplement containing 1000 IU (25μg) of vitamin D3 per tablet, with 96 tablets per pack. Made to British Pharmacopoeia standards, it provides optimal vitamin D levels to support immune system function and overall health. This supplement is manufactured by Vitabiotics, Britain's #1 vitamin company, adhering to high standards of quality control. The product contains D3 (cholecalciferol), which is the preferred and most bioavailable form of vitamin D. Known as 'the sunshine vitamin', vitamin D3 is essential for maintaining healthy bones, teeth, muscles and immune system function. The optimum level dosage of 1000 IU is suitable for daily supplementation.