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<p>Some people might be naturally blessed with pearly whites, but many people aren’t happy with the shade of their teeth.</p><p>There’s nothing inherently unhealthy about yellower teeth, and staining happens throughout our lives.</p><p>Norman and Tegan unpack the long history of teeth whitening (with everything from urine to nitric acid) and discuss where there’s potential for harm.</p><p>References: </p><ul><li><a href="https://www.smithsonianmag.com/science-nature/from-gunpowder-to-teeth-whitener-the-science-behind-historic-uses-of-urine-442390/">From Gunpowder to Teeth Whitener: The Science Behind Historic Uses of Urine</a></li><li><a href="https://www.sydney.edu.au/news-opinion/news/2018/09/10/shades-of-white--what-you-should-know-about-teeth-whitening.html#:~:text=Dr%20Alexander%20Holden%20from%20the,following%20use%20of%20these%20mouthwashes">Shades of white: what you should know about teeth whitening - The University of Sydney</a></li><li><a href="https://www.nature.com/article...