N-Nitrosodiethylamine (NDEA) is a carcinogenic dialkylnitrosamine commonly found in water, tobacco smoke, cheddar cheese, pickled foods, fried foods, and various alcoholic beverages; it is associated with alterations in nucleases involved in DNA repair and replication, targets organs such as the nasal cavity, trachea, lungs, esophagus, and liver to induce tumors in animals, and is most commonly used to induce liver cancer models.