Unlike other home whitening kits, which rely on teeth trays and whitening strips that can be fiddly and result in uneven bleaching, Luster Pro is the first ever home kit to use the same paint-on bleach and 'blue light' technology favored by cosmetic dentists.

Tried and tested: Denise Silvester, 46, from Bromley, said the product worked for her

Users simply paint the gel, which is a non-peroxide bleach, onto their teeth, before pointing a special 'light gun' at them for two minutes. This heats up the gel to between 30C and 50C and speeds up the whitening process.

Manufacturers say the treatment is kinder to gums and eliminates soreness which can sometimes be experienced by users of regular home whitening products.

They say the treatment needs to repeated 10 times for the best results.

Denise Silvester, 46, from Bromley, Kent, who took part in a trial of Luster Pro, said: 'I've always wanted whiter teeth but I could never justify the price.

'I've tried many whitening toothpastes and systems on the market but nothing really gave me significant results.

'But with the Luster kit the results are incredible. After 30 minutes my teeth were significantly whiter and two weeks on the results are amazing - I would recommend to anyone.'