don't they sell the Crest white strips in the UK?
we've been in the states for almost a month now and have done a bit of a study of what's available (including consulting consumer reports)..
in the end my daughter bought the 7 day Crest kit (about $32 per kit, although we just saw it on sale at kmart for $26, including some bonus gifts)..
Crest has 7 day, 14 day and 21 day kits (the longer the time required, the cheaper the kit)..
i think there may even be a new 5 day kit out..
in any case, we bought the 7 day kit and my daughter's been using it for 4 days now and her teeth are definitely much whiter than when she began..
according to consumer reports, the crest white strips get the best results, even in some cases better than the dentist treatment.
you can buy the kits in any store (kmart, target,
walmart, walgreen, etc)....