British study warns of risks of teeth whitening products
Teeth whitening products bought online or over the counter may contain up to 300 times the legally permissible amount of hydrogen peroxide, according to a report by a group called Which? published on June 7 in BDJ in Practice. Investigators from Which? tested at least two teeth whitening products, both gel-filled syringes bought from sellers on AliExpress, that contained dangerously high levels of hydrogen peroxide: around 30% hydrogen peroxide, or

