| http://www.w3.org/ns/prov#value | - I noticed after the first brushing that my teeth felt smoother and although they were not noticably white the first time I have now noticed after two weeks of using this that they do seem to be whiter and they feel smoother when I rub my tongue over them.You can go to www.pearldrops.co.uk for more information about their products if you like.The bottle is a 50 ml bottle so will last for a few week
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