What’s hiding in your toothpaste? Most people are unknowingly brushing their teeth with fluoride, lead, and even arsenic ingredients that can build up in the body over time. Fluoride is a known neurotoxin, banned or limited in several countries. And some mainstream brands have been caught containing trace heavy metals — thanks to contaminated ingredients and poor regulation. Your mouth is one of the most absorbent parts of your body… So what you brush with doesn’t just stay in your mouth it ente