Spoon Feed —
There is convincing evidence that fluoride helps prevent tooth decay. In many parts of the world, a small amount is added to the water supply. This appears to have a small public health benefit in reducing tooth decay, especially among children. But using topical fluoride (such as toothpaste with fluoride) may be just as effective. In some parts of the world with naturally occurring high fluoride levels, excessive fluoride intake is associated with lower intelligence quotient (IQ) scores in children. However, the amount of fluoride used for community water fluoridation does not appear to have a negative impact on childhood cognitive development.