But this isn't the only thing that they are advised to steer clear of, rare meat and tap water are also out of the question for the Royals.
Kate and William have to be careful when trying local cuisine in case it makes them sick. Photo / Getty
These precautions are of course only in place to protect them from contracting any form of bug that may cause a disturbance to their busy schedules.
They are encouraged to get involved in the culture of whatever country they are travelling to, but sometimes this means they cannot sample the local cuisine.
While the Queen is apparently very good at sticking to these rules, it is understood that the younger generations have been known to go rogue and chow down of some of the forbidden foods.