Choline dihydrogen citrate, choline ' s citrate (with the choline ' s assay 35%), has no side effect to people and is a high effectable nutritional additive and fat remover. It can promote the fat ' s metabolism and prevent the fat ' s accumulation in liver. Being a vitamin product, it has been widely applied to medicine, healthcare product and to be an additive in food. For it is easy to be absorbed and its side effect to people is low, the choline dihydrogen citrate has being gradually replaced choline chloride and DL- choline bitartrate, to be as a food additive when being used for children and expectant mother. The pure one of which is white or colorless crystal powder, with the quality reaching to FCCIV and USP standards.