It’s back again.

No, I’m not talking about that itchy feeling that you get when you need to wash your hair.

One of the most iconic sandwiches of all time – The McRib.

Mcdonald’s disappearing meat sandwich, that comes back every blue moon (for the last time is available) again.

Before you get your fingers messy in the saucy concoction you should know this.

The sandwich contains azodicarbonamide.

Fun fact about azodicarbonamide: it’s a flour bleaching agent that is commonly used in manufacturing foamed plastic (think sneaker soles and gym mats). It’s banned in Europe and Australia as a food additive and England classified it as a “respiratory sensitizer” that may cause asthma in persons exposed to it in the workplace. Even though the US only allows small amounts in food, the idea that a sneaker sole agent that can make people sick is a must-use ingredient for a sandwich bun (in a restaurant that sells buns without said additive 365 days a year) is just really troubling.

But wait, the sandwich also contains more than half of your daily intake of sodium.

Talk about a hearty meal.

Yeah..doesn’t sound so good now does it?

Are you a fan of one of McDonald’s most popular sandwiches?