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In the US (and perhaps elsewhere), toothpaste has an expiration date. My quick research shows that this is because the FDA regulates fluoride additives, claiming that after two years, "the fluoride breaks down". Is there a toothpaste expert (e.g. Colgate scientist) who can add an expiration section?
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I read this entire article and realized one of the most common ingredients in toothpaste is missing: titanium dioxide. Anyone with an interest in writing about should take a crack at it. I certainly don’t have the time.
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About usage of the word "healthier" (versus "more healthful" or "more healthy"): all these pages agree that "healthier" is fine.
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Is there a chemist in the house who can explain how a simple F- ion "breaks down"?
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