Patients who have lung cancer can eat royal jelly. In most cases, lung cancer is not particularly closely related to diet. Royal jelly is mainly the food of queen bees, and it contains ingredients that are very helpful in improving human immunity, which is helpful to lung cancer patients to a certain extent. Patients with lung cancer can eat royal jelly with confidence, but they should be careful to judge whether the royal jelly they buy is real or not. If it is chemically synthesized royal jelly, most of the time it may have some harmful ingredients, which may cause some harm to lung cancer patients and delay the treatment.