Just when you thought you knew everything there was about the British Royal Family, a new fact pops up and leaves you wondering what else the monarchy may be hiding.

In the past, we've shared the recipes for the family's favorite dish and go-to snack, the Queen's favorite song, her nail polish of choice as well as some of the strange requirements they have to abide by such as packing an extra black outfit when travelling abroad.

It turns out, there are even more brow-raising rules that anyone with the "HRH" title must meet. It is almost impossible to be a member of the Royal Family and do as you please.

According to BBC, the Royal Family must adhere to strict rules even when it comes to food. When the family travels they have a list of dietary requirements that the host chefs must stick to. For instance, when the Queen and Prince Philip visited Rome and Milan in 2000, garlic, long pastas and "messy" sauces were off the menu.

But, there is one type of food that the Royal Family has been historically known to steer clear from when dining outside of the palace.

One of the major downsides to being a royal is that certain types of seafood are off limits when eating out. The family has been banned from eating shellfish because they pose a high risk for food poisoning.

In addition to shellfish, the Royal Family are discouraged from consuming rare meat, tap water from foreign countries, and food that's too spicy or exotic. These restrictions are in place to prevent illness that could potentially interfere with their duties while they're away from home.

The Queen even carried a box of "homeopathic remedies" in case of emergencies. However, the younger generation of royals have occasionally broken the rules and indulged in some of the banned foods.

What're your thoughts on this food rule? Let us know in the comments!