Since the 1800s, fluoride has been a key component in rat poison and insecticides. When mixed into grain or other food, rats will readily consume the poison and die.
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The Fluoride Deception: Bryson, Christopher, Colborn, Theo: 9781583227008: : Books
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Toothpaste, Cosmetic Dentistry Allentown PA Michael Taras, DMD, LLC