For those of you searching for the answer: When you are hungry for a sufficient period of time, your blood sugar level drops. This lack of sugar causes fatigue, mood swings, etc. It is hypoglycemia, and can have implications for diabetics, and those who are at risk for developing diabetes later in life.
That is why you get grumpy when you are hungry. Moving on:
My name is Lindsay, and I love absolutely everything about food and travel. I do get grouchy when I forget to eat. I hope you enjoy my recipes, stories, and photos posted here.
So eat. And be happy.