A process is provided for inhibiting symptoms of food allergy or food intolerance in a subject that includes the oral administration to the subject suffering from food allergy or food intolerance an IgA or an IgM. When administered in a therapeutic quantity based on the subject characteristics and the type of IgA or IgM, symptoms of food allergy or food intolerance in that subject are inhibited. Even non-secretory forms of IgA and IgM are effective when administered orally.
