Natural Factors Vitamin D3 is sourced from wild-harvested lichen. This unique non-GMO formula was developed especially for vegans and vegetarians, who are more likely to lack this essential nutrient. It provides the most bioactive form of vitamin D3, cholecalciferol, for strong bones and a healthy immune system.
Sourced from wild harvested lichen, the plant-based vitamin D in this formula is in the natural form (cholecalciferol). Natural vitamin D3 is the bioactive form of vitamin D and is necessary for the efficient utilization of calcium, in turn helping to form and maintain strong bones and a healthy immune system. Calcium intake, when combined with sufficient vitamin D, a healthy diet and regular exercise, may reduce the risk of developing osteoporosis.