Soybean meal (SBM) is commonly used for livestock feeds. SBM is the major source of protein in livestock diets used in the United States and several other countries (FAO, 2004). The amino acid profile of SBM fits well with that of corn and some other cereal grains to balance livestock diets; however, its inclusion in diets for livestock is limited due to some antinutritional factors and antigenic soybean proteins causing hypersensitivity. The SBM proteins glycinin and β-conglycinin have been identified to cause hypersensitivity in young pigs (Song et al., 2010; Feng et al., 2007). Processing of soybean may inactivate some antinutritional factors through heat treatment or extrusion; however, those processes may also reduce availability of amino acids, especially when SBM is overcooked. Fermentation has been proven to improve