Quick, easy, and affordable.

These are the three pillars of fast food which keep us coming back again and again.

But how much do you really know about what goes on behind closed doors?

Sit back, relax, but probably hold off on the snacks,

as I reveal some fast food facts you don't want to know.

You're listening. You're listening.

You're listening.

You're listening.

You're listening.

You're listening.

We start with the supposedly healthy sandwich chain subway.

Subway markets itself as a fresher alternative to fast food, but the chain has faced

its fair share of scandals over the years, which might just change the way you look at a foot

long. There's plenty of choice when it comes to bread, but a deep dive into its doughy contents

in 2014 revealed a surprising ingredient. The chemical azodicarboneide was used in North American branches as a bleaching agent and dough conditioner,

and although it was approved by the Food and Drug Administration for use,

you should probably know that this ingredient is also used to make yoga mats and rubber shoes.

Although Subway agreed to phase out the chemical after a petition circulated online, it wasn't

long before they landed in more hot water over a controversy about sandwich wrappers.

According to research in 2017, some fast food wrappers contain toxins like perfluorinated chemicals

which have been linked to health issues like a weakened immune system and even cancer.

As small levels are technically legal, news about reformed packaging has yet to surface,

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