A dentist has warned against an online trend that claims to whiten your teeth as it could cause you serious health issues.

Dr Vikas Prinja, taking to TikTok under the username @thelondondentist, explained how the peroxide mouthwash ‘trend’ needs to stop.

He said: “Everyone wants white teeth, and dentists use the same ingredient [peroxide] to whiten your teeth in clinic, but is this safe?

“Peroxide needs to be at a high enough concentration to whiten your teeth. This sort of stuff is supposed to…