Basically, a person may have trouble breaking down a food, perhaps because of enzyme deficiencies or because of chemicals found in the food that are difficult to process.
Toidutalumatuse korral on organismil raskusi mingi toiduaine seedimisega, kas siis mingi ensüümi vaeguse tõttu või söödud toidus leiduvate kemikaalide tõttu, mida on raske lagundada.