The main component of foam facial cleanser is surfactant, which can reduce the surface tension of water and produce foam. Foam facial cleanser has strong detergency, but its irritation is greater than that of foam-free facial cleanser. Amino acid facial cleanser also belongs to foam facial cleanser, because it is composed of amino acid surfactant, and the facial cleanser produced with it is less irritating, because amino acid surfactant belongs to mild surfactant, which is its advantage. Here, we should correct a mistake. Amino acid facial cleanser is not composed of amino acids.
Foamless facial cleanser is the least irritating facial cleanser at present, which is composed of oil, surfactant and water. Essentially, it is the same thing as the moisturizer commonly used by girls, with low irritation and good makeup remover, but poor detergency. Because there is little surfactant added and a lot of oil, there is no foaming.
As far as boys are concerned, you should choose foam facial cleanser. Boys don't wear makeup, don't have to consider removing makeup, often play ball and go out, their faces are dirtier than girls, and their skin allergies are less.