You probably never pay attention to the box at the bottom of the packaging when buying toothpaste. In fact, the box reveals whether the toothpaste contains only natural ingredients or chemicals.

Secret-Color

If on the bottom of the tube is found black code it means that the paste contains only chemicals.

If the code is red then the toothpaste contains natural substances and chemicals.

If the code is blue it means that the toothpaste contains natural substances and drugs.

If the code at the bottom of the toothpaste package is green then it is made with an all-natural ingredient.

 

Source: http://www.cuisineandhealth.com/you-must-pay-attention-to-this-sign-on-the-toothpaste-here-is-why/