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How are minerals formed by biological processes?

News to me is that about 4500 of the 4900 minerals on Earth have been created by life. What are some examples of such processes? Are some minerals formed inside the human body?
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What is the biochemical pathway of fluoride?

Fluoride is a common active ingredient in tooth paste to prevent dental caries. It is also added or removed from the water supply in some communities for the same reason, but in children only. My ...