Soymilk coagulation is the most critical step for obtaining good tofu texture and yields. The coagulants used can be of slow-action(CaSO4 and GDL or glucono-d-lactone) and quick-action (CaCl2,MgCl2 and MgSO4) and result in silken or filled and firm (momen) tofu, respectively. Curd formation involves complex interactions between soybean proteins, coagulants and non-protein compounds such as phytates, lipids and carbohydrates