Bio-D-Mulsion® supplies vitamin D3 (400 IU per drop) in an emulsified form to aid in uptake and assimilation, especially important for those with malabsorption issues. While the importance of vitamin D for musculoskeletal health is well documented, its importance in numerous other aspects of health are now recognized. They include (but are not limited to) cardiovascular health and immune function. Also noteworthy is the fact that inadequate levels of vitamin D are extremely common.