Transparent gel for applying to interdental brushes. Neutral taste and smell. It seems to do what it was designed and promises to do: help remove plaque from the interdental spaces for more effective cleaning of food debris left between the teeth, which a toothbrush cannot remove (although the brush is what mainly does this mechanically). It works through the active oxygen produced when the carbamide peroxide (11%) contained in the gel breaks down on contact. The oxygen produced (which appears as foam) destroys microbial plaque and oxidizes food debris. Bear in mind that it also contains fluoride (1000 ppm), supposedly to fluoridate the interdental surfaces. So this should also be taken into consideration for children or if fluoride is being taken in another way (toothpastes, for example, contain 1000–1500 ppm, mouthwashes contain just as much, many supplements also contain it as a trace element, etc.).
Why is fluoride needed, and why did they add it? Plaque acids generally cause demineralization of the teeth (that is, loss of their mineral elements). The calcium in teeth is also a metal (divalent and a member of the second group of the periodic table, known as the “alkaline earth metals”), resulting in gradual wear of the tooth surface. Topical application of fluoride, meanwhile, seems to accelerate the process of restoring the mineral elements.
It comes in a 30 ml package (small bottle), which nevertheless lasts quite a while since only a very small amount is used on the interdental brush each time.