It contains a kind of vegetable gum and mucus which is very beneficial to human body. It can not only nourish yin and beautify, but also decompose the dirt in the gastrointestinal tract, and has the function of cleaning the stomach and intestines. The crude fiber of tremella helps gastrointestinal peristalsis and reduces fat absorption, so it helps to lose weight and remove chloasma and freckles on the face.