D3-5000™ bioidentical vitamin D supplement is considered both a hormone and a vitamin, is produced in response to skin’s exposure to sunlight and is fundamental to the body’s absorption of calcium. Natural vitamin D3 (cholecalciferol) is four times more potent than synthetic vitamin D2. Sound evidence suggests that vitamin D intakes well above current recommendations are beneficial, and when combined with calcium, have a significant impact on overall bone health. Vitamin D has been the subject of many studies for its effect on the immune system by promoting phagocytosis and immunomodulatory functions.