Calcium fluoride as found naturally in mother's milk, goat's milk, cheese and tea must never be confused with the toxic chemical form, sodium fluoride as added to city water.
There is great debate as to the potential toxicity and usefulness of the industrial sodium fluorite form as added to city water (The Soviets dosed political prisoners with sodium fluoride to assure lack of drive, lack of self-direction and an early death of "natural" causes.)
Human Mother's Milk, Goat's Milk, Seafood, Kelp, Dulse, Nutritional Yeasts, Whole Grains and Organic Veggies are rich food sources of the beneficial organic calcium fluoride form. The ratio of "bad" fluoride to "good" fluoride in our bodies has increased dramatically over the last 100 years.
Most plants contain some calcium fluoride as may be available from the soil. Too little in the diet can result in poor tooth and bone formation, and weak bones and dental cavities.
Several highly regarded health foods are meaningful sources of calcium fluoride. These include chlorella, spirulina, kelp, dulse, nutritional yeast, whole grains and sprouts, wheat grass and barley grass juice.