Trehalose composed of two glucose molecules bound by an alpha, alpha-1, 1 linkage is one kind of
disaccharide with irreducibility. It is white, odorless powder and with relative sweetness 45% that of
sucrose[7]. Trehalose can be found in most living organisms, including bacteria, fungi, insects, plants, and invertebrates[8-10]. It provides energy for them, and because of its inherent properties, namely prevention of starch retrogradation and stabilization of proteins and lipids, it can protect cells and biomolecules from injuries imposed by high osmolarity, such as heat, oxidation, desiccation and freezing naturally[11–13]. So trehalose is called ‘the salt of life’.