Show Notes
Most dentists say you should brush your teeth twice a day, so if you think about it, it's one of the most regular things we put in our mouths.
But how much do you know about the chemicals in your toothpaste?
Cosmos Magazine journalist and resident chemistry expert Ellen Phiddian runs us through what's in your toothpaste and the tablets some claim can replace brushing altogether. See omnystudio.com/listener for privacy information.
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Some things are so tiny you can't see them under a normal microscope – think proteins and molecules. These are a thousandth of the size of the red blood cells running through your veins.