In many posts on social networks, it is claimed that the colors of the strip at the bottom of the toothpaste indicate its ingredients, but is it true?
According to the claims: the black color indicates that the paste contains chemicals; red color indicates that there are natural ingredients + chemicals; blue color indicates that the ingredients are natural + medicines; green color indicates that the ingredients are natural.

According to Healthline, a trusted source of health information, there is no connection between color and ingredients. The lines on the bottom of the toothpaste are simply a mark made during the manufacturing process. These marks are read by light beam sensors, which tell the machines where to cut, fold or seal the packaging.
“These signs come in many colors and are not limited to green, blue, red and black. Different colors are used in different types of packaging or with different sensors and machines,” writes Healthline.
So if you want to know what ingredients your toothpaste has, you can read the ingredient list. According to the American Dental Association, most toothpastes contain the same basic ingredients, such as cleansers, flavoring agents, softening agents, foaming agents, fluoride, etc.