Liquid Vitamin D-3 has 400 IU per four drops. It provides structural support and helps maintain strong bones.
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.
Each drop contains 100 IU of vitamin D. Therefore, 4 drops provide 400 IU and 20 drops provide 2,000 IU.