Solgar® has been crafting nutritional supplements for generations, in fact over 65 years. And, just like all the other supplements, U-Cubes benefit from all the science and knowledge behind our name. Each serving of these tapioca-based gummies provides 100% DV (400 IU) of Vitamin D3 for children 4 years and older and 50% DV (200 IU) for children 2 and 3 years of age...and naturally, they are Non-GMO. Like everything at Solgar, U-Cubes are manufactured in batches that ensure the highest quality product and rigorously tested for safety and potency, but never animal tested. The result? A great-tasting multivitamin that U can be sure is great for your children.