For anyone who is curious, the reason calcium fluoride (CaF2) is safe is because the calcium forms a stronger bond with fluoride than sodium does, so it's much less soluble in water. Sodium fluoride dissociates into Na+ and F- in solution, and then F- pulls some H+ from nearby water molecules which forms HF, or hydrofluoric acid, which is also extremely toxic. F- is very reactive and so it will attach itself to any molecule it comes in contact with. The body deals with it by taking calcium from other tissues and depositing the excess CaF2 in bones and teeth (it also ends up in the pineal gland). Fluoride supporters say it makes those tissues stronger. It actually makes them more brittle because the fluoride disrupts the natural structure, but technically the calcium-fluoride bonds are "stronger" so that's how they get away with saying that.

For anyone who is curious, the reason calcium fluoride (CaF2) is safe is because the calcium forms a stronger bond with fluoride than sodium does, so it's much less soluble in water. Sodium fluoride dissociates into Na+ and F- in solution, and then F- pulls some H+ from nearby water molecules which forms HF, or hydrofluoric acid, which is also extremely toxic. F- is very reactive and so it will pull electrons from any nearby molecule or attach itself to anything it comes in contact with. The body deals with it by taking calcium from other tissues and depositing the excess CaF2 in bones and teeth (also the pineal gland). Fluoride supporters say it makes those tissues stronger. It actually makes them more brittle because the fluoride disrupts the natural structure, but technically the calcium-fluoride bonds are "stronger" so that's how they get away with saying that.

For anyone who is curious, the reason calcium fluoride (CaF2) is safe is because the calcium forms a stronger bond with fluoride than sodium does, so it's much less soluble in water. Sodium fluoride dissociates into Na+ and F- in solution, and then F- pulls some H+ from nearby water molecules which forms HF, or hydrofluoric acid, which is also extremely toxic. The body deals with it by taking calcium from other tissues, mainly bones and teeth. Fluoride supporters say it makes those tissues stronger. It actually makes them more brittle because the fluoride disrupts the natural structure, but technically the calcium-fluoride bonds are "stronger" so that's how they get away with saying that.