Teeth whitening is normally safe when monitored; overuse or high concentrations without guidance can aggravate gums

https://privatebin.net/?057b5b72369b1ede#5mGJ7qs9KcCgmLSMWtdq6fGVxRkrMVWpDfE8zFjPc7iy

Teeth whitening is normally safe when monitored; overuse or high concentrations without guidance can irritate gums and increase level of sensitivity-- follow instructions carefully.