Hello Interloper!
Menu
The NHS warn that some at home kits can be damaging as they can’t protect your gums and the gel may leak into your mouth.
The product you are buying online may come from another country with less stringent health and safety regulations, meaning that it could contain a higher level of hydrogen peroxide which is damaging to both teeth and gums.
If you have any doubts about a product that you have bought, the best person to ask is always your dentist.
It’s best to buy teeth whitening products directly from your dentist, as they will be able to vouch for the product, assess the suitability of your teeth to the bleaching process, and give you the best possible advice on how to use it safely at home.