Vitamin D products come in different formats and combinations, so identify the exact vitamin D listing before comparing amounts. The children's liquid D3 product is one example with a clearly stated format. Check the intended age range, labeled serving and units on the current panel. Other vitamins may appear nearby, but a vitamin A, B or C name alone does not establish vitamin D content.View Children's Liquid Vitamin D3 – 400 IU (1 fl. oz.).