Lifestyle
You’ve probably noticed the small colored squares or stripes at the end of toothpaste tubes.
Red, blue, green, black… they’ve sparked countless theories online—especially the idea that they reveal what’s inside your toothpaste.
But is that actually true?
Let’s clear up the confusion.
The Viral Claim About Toothpaste Colors
Many articles and social media posts suggest that the colored stripe tells you what kind of ingredients the toothpaste contains:
Green = natural
Blue = natural + medicinal
Red = natural + chemical
Black = all chemicals
It sounds helpful—but there’s one big problem.
The Reality: It’s a Manufacturing Mark
Those colored marks are not meant for consumers at all.
They’re called “eye marks” or registration marks, and they’re used during the manufacturing process. Machines read these marks to know where to cut, fold, or seal the packaging.
👉 In other words: they have nothing to do with the ingredients inside the toothpaste.
Why the Myth SpreadWhy the Myth Spread
The idea stuck because it feels logical.
People want quick ways to identify natural or safe products, and a simple color code seems like an easy shortcut. But in reality, toothpaste formulas are far more complex and can’t be summed up by a single color mark.
How to Actually Choose the Right Toothpaste
