Ultrawhite Opal, from Janina International

Marks out of five: five.

Stockists: Selfridges, independent chemists, dentists and Boots.

Claims: “The true whitening toothpaste... Unique non-abrasive formulation contains not only most of the active ingredients found individually in other good oral hygiene products but also the new patented Bromaine Complex.”

Abrasiveness rating: 20.

Dr Lynch: “Ultrawhite is claimed to contain 16 active ingredients. It has ingredients for improving oral health by controlling caries, plaque, tartar, helping protect gums, whitening teeth and freshening breath.”

NOTE: Ultrawhite Opal has since changed it’s name to Janina Sensitive Whitening Toothpaste.