Fluoride, the alleged main ingredient in the Syrian chemical weapons arsenal, is a chemical by-product and is the same ingredient that is dumped in most U.S. big city water supplies. Leave this, in the ground where it belongs
At least when it comes to topical application, you have a choice. You can easily buy fluoride-free toothpaste and mouthwash. But you're stuck with whatever your community puts in the water, and it's very difficult to filter out of your water once it's added.