A green line on the tube of toothpaste
To some, the presence of a green stripe on a tube of toothpaste suggests that it contains only natural components. By "all-natural," we imply that the toothpaste is free of any synthetic ingredients, preservatives, or whitening agents.
A cyanotype
If a toothpaste has a blue stripe, it might be a combination of natural ingredients and a medication. When people say that toothpaste has "added medications," they can mean that it contains certain pain killers or whitening agents.
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