Final answer:
Fluoride gels are not recommended for children under six due to the risk of dental fluorosis, while they provide dental health benefits to older children and adults.
Step-by-step explanation:
Fluoride gels are not recommended for children under the age of six. The FDA, EPA, and CDC align on this recommendation due to potential health concerns. It is important to note that for young children, excessive fluoride intake can lead to dental fluorosis, which can cause changes in the appearance of the tooth enamel. For children over six and adults, fluoride has many benefits, such as strengthening tooth enamel and helping to prevent cavities. Community water fluoridation is considered the most cost-effective method of delivering fluoride to all, aiding in the reduction of tooth decay by 25% in children and adults.