You may have already noticed these small colored squares at the bottom of the toothpaste tubes and heard that they reveal the composition of the product. There are rumours that these colours indicate whether toothpaste contains natural ingredients or chemicals. But what is the real situation? Let us decipher this received idea together and discover the true function of these marks.
The myth of revealing colors

Much relayed information on social networks claims that the colour of the marking at the bottom of the toothpaste tubes would indicate the nature of the ingredients:
- Green – 100% natural
- Blue – mixture of natural and medicinal products
- Red – combination of natural and chemical components
- Black – all-chemical
Although this explanation may seem credible at first glance, it is totally false. It is a modern myth that has been circulating for years, sowing in health-conscious consumers.
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