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Why does toothpaste contain fluoride?

Why does toothpaste contain fluoride?

Update: 2024-11-291
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Dr Chris Smith takes on listener questions on South Africa's CapeTalk. Why is there a delay between live TV and radio? Do wind turbines warm the air at ground level? Do we need to decommission the ISS? What causes genital warts? Like this podcast? Please help us by supporting the Naked Scientists
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Why does toothpaste contain fluoride?

Why does toothpaste contain fluoride?

Dr Chris Smith