How to tell whether toothpaste is true or false?

1, check the color of the bottom of the back of the toothpaste: every toothpaste will have such a color block, usually red, blue, green and black. The color bar at the bottom of the toothpaste tube represents different ingredients, green represents pure nature, blue represents part natural and part medicinal ingredients, red represents half natural ingredients, half chemical ingredients, and black represents 5% chemical ingredients.

2. Squeeze out the toothpaste to see if the toothpaste is even: squeeze out the toothpaste on the toothbrush to see if the toothpaste is even. Good toothpaste is soft, without bubbles and holes; Bad toothpaste is uneven, with rough surface, blistering and pores on the surface.

3. Squeeze the toothpaste on the dry paper towel: squeeze the toothpaste on the dry paper towel to see if there will be wet water stains on the paper towel. If there is, it means that the toothpaste contains water, which means that the production is unqualified. If there is no wet water line, then toothpaste is normal.

Extended data:

Precautions:

1. Toothpaste is washed away without staying in the mouth for a long time, so it is difficult for some special toothpastes to work in a short time. If your teeth are healthy, you can choose ordinary toothpaste.

2. It is best to change toothpaste: there are many kinds of toothpaste, which can be roughly divided into three categories: ordinary toothpaste, medicinal toothpaste and fluoride toothpaste. On the basis of ordinary toothpaste, some drugs with oral health care function or fluoride with caries prevention function are added to become medicinal toothpaste and fluoride toothpaste.

3. Don't use a tube of toothpaste for too long: because the longer the toothpaste is used, the more chances it will come into contact with air, the higher the frequency of contact with toothbrush and the greater the chance of contact with bacteria.

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