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I've tried numerous ones, and nothing has ever made a noticable difference on my teeth. My teeth don't look that bad though, so I just quit caring about it and never buy any whitening stuff any more.
I just use the whitening toothpaste but I don't really notice a difference after using it for a couple of years now. I just keep it since I'm so used to it now.
whitening toothpaste has the same active ingredient as regular toothpaste. some will have peroxide, but you would need to brush your teeth for significantly longer than 5 minutes for it to start working