Due to hunger, when people get grumpy and angry, then they are said to be hangry.

Hunger induced anger is believed to be caused due to various reasons.

Dude.

Tell me fast.

I am feeling hungry.

Alright.

When we eat food, it is mostly converted to glucose.

This glucose is absorbed by blood and then transported to our cells, especially those present in our brain.

However, when glucose level drops, our brain perceives it as a life-threatening situation.

It gets stressed, thus making us impatient and irritated which eventually leads to anger.

In addition to this, when our energy levels are low, a brain chemical called Neuropeptide.

Y is produced that makes us hungry and encourages us to eat.

But as the same chemical regulates aggression, its production makes us angry as well.

Thus making us hangry.