Fast-food franchises get as big as they are for a lot of reasons.

Trademarksecret recipesand surprising ingredientssometimes troublesome oneshave kept these businessesbooming for decades.

No, there aren’t vegetables in your nuggets.

woman eating mcdonalds fries

Photo: Boyloso / Shutterstock

Celery salt is a mixture of ordinary table salt and ground-up celery seeds.

While this preparation may seem odd, it’s actually fairly commonplace in the food world.

Okay, Buffalo Wild Wings is technically fast food, but this is an interesting one.

mcdonalds chicken nuggets

Deman / Shutterstock

However, some secrets have to be spilled, even if it’s just a little one.

Popeyes chicken, according to their nutritional menu,contains MSG.

While many have anegative association with MSG, it’s nothing more than a flavor additive.

woman eating mcdonalds fries

Photo: Boyloso / Shutterstock

MSG has a long, complex history of stigma in the West.

Anyone who’s had one can attest to that.

The brine at Chick-fil-A

Have you ever wondered how a Chick-fil-A sandwich can have such juicy chicken?

Buffalo Wild Wings meals

Buffalo Wild Wings / Facebook

The answer is in the brine.

Sugar is hygroscopic, meaning that it attracts and holds moisture.

So, without sugar, most bread would be dry and pasty.

popeyes chicken nuggets

Courtesy of Popeyes

Is that necessarily the healthiest thing in the world?

Perhaps not, but that sugar is a key ingredient to making Subway bread what it is.

Right, almost no one.

wendys-frosty-car

Courtesy of Wendy’s

In case you’re curious, these are the chains that usefresh-cut potatoes for their fries.

Burger King’s Whopper

Burger King / Facebook

Chick-Fil-A sandwiches

Chick-Fil-A / Facebook

subway catering

Subway / Facebook

fries salt

Shutterstock