Whitening toothpaste is an elastic gel film patch for tooth whitening. Because its price is cheaper than other whitening methods, many people choose to use whitening stickers. But can whitening toothpaste whiten teeth and how long can whitening last? Next, I will give you a detailed introduction. First of all, I will tell you that whitening toothpaste will have some effect on whitening teeth, but the effect is not obvious and the maintenance time is not long. Whitening toothpaste mainly discolors teeth and lightens yellow teeth. However, the ingredients in whitening toothpaste will stimulate the nerves and blood vessels at the gingival margin, which may easily lead to allergies, such as sourness, fear of cold and even infection. If used frequently, it will destroy the enamel structure, make the tooth surface rough, and in severe cases, dentin hypersensitivity will occur. The best way to whiten teeth is cold light whitening. Cold light whitening teeth can remove pigment deposits on the surface of teeth at one time, so that teeth can quickly return to their original colors. The process of cold light whitening teeth is simple, safe, rapid and effective. Cold light whitening effect is faster and brighter than traditional methods.