The danger is that this can lead to blistering and sensitivity.
Verdict: Will whiten teeth but application method has potential for bleach to leach on to mouth and gums.
THERAMED PERFECT Theramed Perfect Express White Intensive Whitening Toothpaste, £3.99/ one week course (large supermarkets and chemists).
An intensive whitening toothpaste that promises 'whiter teeth in seven days' thanks to a 'professional cleansing ingredient which is also used by dentists'.
However, the British Academy of Cosmetic Dentistry (BACD) has issued a warning claiming that many DIY whiteners fail to give a good result or can even cause permanent damage to teeth.
Dr Stemmer says: Calling this toothpaste a whitening product is perhaps misleading.We all want a brighter, whiter smile, but with whitening treatments at the dentist costing up to £750 a time, many people are turning to DIY kits.There are plenty to choose from, with supermarket shelves literally groaning with 'whitening' products and toothpastes.The impressions are then returned to the Smile Place for bespoke dental trays to be made.