After years of staining my teeth by drinking coca-cola regularly, as well as destroying the enamel from sucking and eating whole lemons, I'm fed up with my discoloured and yellowed teeth. They're perfectly healthy, they're just majorly stained and not as 'cosmetically' appealing as some. I personally hate the discolouration of my teeth, and have been considering getting them whitened for some time...I just don't know what type to go for, and where to go, etc etc. But I thought I'd give this product a try first. At £4 it's a much cheaper option than whitening, and after all, it does promise on the packaging 'up to 4 shades whiter in just 3 weeks!'. So, did it make my teeth up to 4 shades whiter? No. Not at all. Not even one shade lighter.
I've been using this toothpaste for a couple of months now (a lot longer than the apparent 3 weeks it takes for it to work), and I haven't noticed a single difference. I'm actually really disappointed with this product, and I guess now I'm gonna have to try professional teeth whitening.
Do any of you have any tips or know of any good (and reasonably priced) places to get my teeth whitened?

