If you have a child who is under three years of age (or who is still not able to spit), then it is advisable to have a toothpaste without fluoride in your stash. Toothpaste with fluoride has known to present certain health risks to young children. A child can swallow too much fluoride especially when they are too young and it's still tough to teach them how to spit the toothpaste out. When a lot of fluoride is ingested, it can lead to fluorosis (American Dental Association). Other adverse effects may include weakened bones and ligaments. Muscle and nerve problems were also noted. That is why it is best if you let your child use a toothpaste without fluoride.