Edible toothpaste isn’t 100% safe for kids, here’s why Even though “edible” toothpaste sounds safe, it’s not 100% risk-free for kids. Young children often swallow toothpaste instead of spitting it out, and if it has fluoride, that can lead to too much fluoride in their system — causing white spots on teeth (fluorosis) or stomach upset. Candy-like flavors also make kids more likely to eat it like a treat. So, always supervise brushing, use only a tiny amount (rice-grain size for under 3, pea-size