Vitamin D3 Liquid, Extra Strength

• 1,000 IU per DropHelps Maintain Strong Bones*NOW Vitamin D3 Extra Strength liquid supply this key vitamin in a highly absorbable liquid form. Vitamin D is normally obtained from the diet or produced by the skin from the ultraviolet energy of the sun. However, it is not abundant in food. As more people avoid sun exposure, vitamin D supplementation becomes even more necessary to ensure that your body receives an adequate supply.This extra strength product has ten times the D3 per drop (1,000 IU) as our regular strength product (100 IU).