If you brushed your teeth this morning you might have noticed this. Some toothpaste have those red and blue lines? Are they just for show? Or do the mean something?
Back in the 1970s solid white toothpaste was just meant to clean the mouth. But more and more customers wanted it to freshen their breath too. So Aquafresh decided to add a blue stripe in theirs to signify that it could do both things, clean and freshen. Then once people started to care about their gum health more they added a third red line to show it now had plaque control as well.
Even though some toothpaste can do all three things with a solid white, a lot of them still keep the blue and red too because it sells more.
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