Vitamin D3 supports a healthy immune system and the development and maintenance of healthy bones.* Not all Vitamin D3 products are created equal. Vimergy Vegan D3 is 100% plant-based and comes from cholecalciferol-rich lichen extract (whereas many vitamin D3 supplements are animal-based). Vimergy Vegan Vitamin D3 provides 1,000 IU (25mcg) of Vitamin D3 in each serving and contains no fillers, additives, alcohol, or hidden ingredients.