D3 2000 Complex delivers 50 mcg (2,000 IU) of the preferred form of vitamin D, as vitamin D3, in each tablet. The inclusion of isoflavones may help facilitate the body's utilization of vitamin D3. Vitamin D insufficiency is common and is increasingly considered an emerging global health issue. This product features high-potency vitamin D, which is important for maintaining healthy bone structure and immune function. Some research suggests that vitamin D sufficiency may contribute to cardiovascular health and function.* In the past, vitamin D was thought to function primarily in bone mineralization. Today we know that vitamin D is actually a hormone that plays a role in numerous pathways and aspects of human health (Kuchuk NO et al. J Bone Miner Res. 2009;24(4):693-701; Wranicz J et al. Rocz Panstw Zakl Hig. 2014;65(4):273-279).