At the bottom of the toothpaste tube there is a color bar. And now I know the meaning of the color bar!
Try to choose green and blue, there are four kinds:
Green: natural;
Blue : Natural + Medicine;
Red : Natural + Chemical composition;
Black : pure chemical.
OTHER VERSIONS
1. Did you know squares on tubes means something
Green : All naturals
Red : some natural, but most chemicals
Black : Only chemicals are used.
2. Black/Blue line: 100% chemical
Red Line: 50% chemical, 50% natural
Green Line: 100% natural
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