Fluoride is among the best and safest ingredients that help prevent cavities among children. However, children below 8 years old who receive too much fluoride may incur dental fluorosis — white marks that appear on teeth that are still forming below the gums. Sodium lauryl sulphate is a foaming agent commonly used in toiletries. It makes toothpaste spread more easily across the oral cavity to remove food residues. The main concern with this ingredient is it causes irritation to certain individuals, particularly around the eyes. Most children’s toothpaste also include some form of artificial sweetener to make kids enjoy using them. Saccharin is the most common sweetener and has been shown in scientific studies to potentially cause cancer in animals.