Personally, I use mild soaps, many do not even suspect what is what are mild soaps. The most popular element of hydration is glycerin. Soap with its content is softer than ordinary. Very often it looks light-transmitting or translucent from the outside. But consumers are obliged to know that such soap, produced industrially, does not always have great quality. Glycerin is considered a very capricious and unreliable substance. Crystal light transmission in such conditions can be achieved only by adding alcohol. The soap I use is made from real products.