Transparent gel for application on 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 a more effective cleaning of food debris that remains between the teeth and which the toothbrush cannot remove (mechanically, this is mainly done by the brush). It works with the active oxygen produced when the carbamide peroxide (11%) contained in the gel breaks down upon contact. The produced oxygen (appearing as foam) destroys microbial plaque and oxidizes food residues. Keep in mind that it also contains fluoride (1000ppm), for the fluoridation of interdental surfaces, as it says. So this should also be considered for children or if fluoride is being taken in another way (toothpastes, for example, have 1000 - 1500ppm, mouthwashes about the same, many supplements also contain it as a trace element, etc.).
Why is fluoride needed there? The acids of plaque generally cause demineralization of the teeth (that is, loss of their mineral elements – and calcium, of course, is a divalent metal and a member of the second group of the periodic table, known as the "alkaline earth metals"), resulting in the gradual wear of the tooth surface. Local application of fluoride seems to accelerate the process of restoring the mineral elements.
It comes in a 30ml package (small vial) which, however, lasts quite a while since only a very small amount is used on the interdental brush each time.