Trehalose is a non-reducing sugar formed from two glucose units joined by a 1-1 alpha bond.It serves as a carbohydrate reserve in microorganisms and protects them from adverse conditions.
Trehalose is a non-reducing disaccharide, ubiquitously present in nature. It is used as a food preservative and also to retain enzymes, vaccines, cells and many other molecules. Trehalose is present as hemolymph sugar among the invertebrates.