Erythritol is a kind of filled sweetener and is a four-carbon sugar alcohol with the molecular formula C4H10O4.Erythritol is widely found in nature, such as fungi like mushrooms, lichens, melons and fruits like melon, grape, pear, and can also be detected in a small amount in animal eye crystals, plasma, fetal fluid, semen and urine. It also exists in a small amount in fermented food wine, beer, soy sauce and Japanese sakes.It can be fermented by glucose as a white crystalline powder, with refreshing sweet taste, not easy to absorb moisture, stable at high temperature, stable in a wide pH range, mild cool feeling when dissolved in the mouth, suitable for a variety of food.