A flight attendant has revealed the truth behind "unhealthy" plane food in a Quora post. The food is apparently prepared 12 hours — or even days — before departure. Eggs are often made of a mix of actual egg and "other substitutes." Spices, salts, and fats are added to make the food taste less bland. Even fruit isn't a safe option, according to the post. Unless you're lucky enough to travel in first class, most of us don't expect fine dining on a flight — but it turns out we might be better off not eating anything on-board at all. Writing on a Quora thread, user Shreyas P, who claims to have been a flight attendant for five major airlines, warned that airline meals are "very unhealthy," even if you've opted for the raw or vegan option. "The food on your tray is prepared not in the galley but in the aircraft catering which is often done 12 hours before and even days before the aircraft departure," Shreyas wrote.