Solgar® has been crafting nutritional supplements for generations—over 70 years. And, just like all our other supplements, U-Cubes™ Vitamin C Gummies benefit from the extensive science and knowledge behind our name. Each serving of tapioca-based U-Cubes™ Vitamin C Gummies provides 500 mg, per 4 gummies of Vitamin C for Children 4 years and older and 250 mg, per 2 gummies for children 2 and 3 years of age.