Garlic chives, celery, bean products, and others are gas-producing foods. You should avoid eating these foods 30 minutes before your flight, as they can cause stomach pain, especially garlic chives, which are often easily overlooked. Xu Xianrong, director of the Flight Crew Department at the Air Force General Hospital, explains that as the aircraft's altitude increases, the external atmospheric pressure drops. This causes the intestines to expand. If you have consumed gas-producing food beforehand, it will lead to further intestinal expansion, resulting in severe abdominal pain and a frequent urge to use the restroom.
Although civil aviation aircraft are pressurized during flight, which generally does not affect passengers' normal diet and rest, it can still have a certain degree of impact on individuals who are prone to gastrointestinal discomfort.
In general, in addition to avoiding gas-producing foods 30 minutes before boarding, it is best to choose beverages like tea and mineral water during the flight, and try to avoid consuming carbonated drinks like Coke, Sprite, and alcohol.