Written on: 23/02/2010
"whiter by 3 shades" is useless info as theres no uniform shade chart. My teeth were brownish yellow, now theyre greyish yellow after 26days whitening. My dentist told me, I'd need trays for 4 hours a night for 4 weeks+, dr.george claims its 16% peroxide is same as dentist strength...recommends 60mins a day for 2wks...HAHA, so dr george info is WRONG, you cannot achieve those results in a short time. I will need to bleach for 4 months @ 1hour a day to achieve the same results as dentist. However, dentist = 400 pounds, dr george= £26 + a free blue light. saving £374!!! Can't complain even if no guarantee of pure white teeth! If I achieve whitish grey teeth, that'll do for the price.