This product contains 100µg (4,000i.u.) of vitamin D3 as cholecalciferol from a vegetarian source and 100µg of vitamin K2 (MK-7). It is intended for short term use to elevate levels of vitamin D where low levels have been identified with a blood test. Alternatively, it may be taken for two to six months over the winter. It is ideally used in conjunction with any of our multi-formulae.