GlaxoSmithKline is extending the Aquafresh brand with a toothpaste that claims to protect teeth above and below the gum line.

The company hopes Aquafresh Ultimate (rsp: £1.79) will grow the mid-market between standard pastes retailing for about £1 and premium products such as GSK's own Sensodyne Repair & Protect (rsp: £3.99).

The mint-flavoured paste will be available in Ultimate and Ultimate Whitening variants from this month, backed by TV and cinema ads.