For adults, take one (1) softgel up to two times daily, preferably with meals. High potency vitamin D3 features a potent and bioavailable form of this essential vitamin. Vitamin D3 works with calcium to support strong bones and teeth. These fast-acting liquid softgels provide you with a high-potency source of Vitamin D to assist with maintaining a healthy immune system. D3 also contributes to neuromuscular health, which is the combination of the nervous system and the muscles working together.