Important Junk Science lesson here folks, whenever you read someone talking generically about "toxins" or declares something as being inherently "toxic", that should be a big red flag for the advice that follows. The first rule of toxicology is "The dose makes the poison." Everything, including distilled water, is "toxic" to human beings at some level. Yes, fluoride certainly also CAN be toxic above certain concentrations in people. But it is a naturally occurring mineral that is often found in ground water. Toxicity also often isn't linear, meaning that substances normally aren't harmful to some degree at all levels (unless you're talking about Plutonium). In fact, as has been shown with fluoride, at lower doses "toxins" can have a net positive benefit. The dreaded arsenic is another example. It has a lot of medicinal benefits at very low doses. Arsenic compounds are still used to treat psoriasis and leukemia and in the past was effective in treating STDs.