Vitamin D3 is essential for a healthy immune system, cardiovascular health, bone health and many other systems in the body. Getting enough vitamin D is a challenge in northern climates. Platinum Naturals’ Vitamin D3 provides you with the recommended daily dose of 1,000 IUs in coconut oil for easy absorption. Vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). D3 is the form that we produce in our skin when we are exposed to sunlight. Studies that compared D2 and D3 have reported that D3 is more biologically active in raising vitamin D levels in the blood, thus providing the health benefits associated with adequate vitamin D levels.