However,  a priori  is sometimes used to modify other nouns, such as truth. Philosophers also may use apriority and aprioricity as nouns to refer (approximately) to the quality of being  a priori .
Lectins are drawn right to that lining, and your immune system retaliates. Lectins are found in all foods, but in some more than others. All seeds of the grass family - wheat, rye, rice, spelt, etc. - are high in lectins. You also find lectins in beans, dairy and in the nightshades (tomatoes, potatoes, eggplant). According to a 1991 study, dairy may be potentially more harmful in pasteurized, processed milk because of the reduction of SIgA, an immunoglobulin that binds dangerous lectins.
Many other beans also contain it, albeit in lower amounts, including white kidney beans and Greek butter beans. This lectin is why you should never eat beans raw or undercooked, lest you come down with bloody vomiting and other symptoms reminiscent of severe food poisoning. As few as five undercooked beans can cause severe symptoms.