"This is scientific American sixty seconds science. I'm Christopher Dodd Yata. All the stuff you can buy on EBay. Here's a new one human teeth. I think I probably averaged maybe five dollars a tooth Kelly Keenan a biochemist at Stockton university in New Jersey. She chased down the choppers to investigate what whitening strips due to a tooth, chemical composition. She stuck the teeth and styrofoam applied the whitening strips per manufacturer instructions and added some artificial saliva a liquid mixture at the ph with salts you'd find in regular spit treatments, complete she extracted proteins from the teeth and found that the more rounds of whitening the teeth experienced the fewer proteins, she could recover because hydrogen peroxide in the whitening strips was snipping chemical bonds that they take sure is that hydrogen peroxide can penetrate the enamel in Denton, and it can cause your proteins to break down and smaller pieces. Are removed from those proteins. She and her undergraduate students presented on that research at the twenty nineteen experimental biology meeting in Orlando now, this is just a preliminary study and the pope of your teeth can replenish proteins in the Denton, though, not the Anabel. So it's unclear whether these effects would cause permanent damage in real living teeth. One thing's for sure, though supplies of teeth for experiments seemed to be plentiful. I said if fifteen and the person's like women, you need more and this person also claimed that the teacher from his mouth which. You don't have any more to go. Thanks for listening for scientific American sixty seconds science. I'm Christopher Don. Yata?"