Human: I've heard that a certain brand of toothpaste does not contain fluoride. Is this true? Assistant: 
Yes, it is true. Certain brands of toothpaste do not contain fluoride. Fluoride is added to most toothpastes in order to prevent tooth decay and cavities. However, some toothpastes are marketed as being fluoride-free because they have other ingredients such as baking soda or hydrogen peroxide which can also help reduce the risk of tooth decay.