Why Do Some People Not Feel Hungry When They’re Stressed?

At first, I wanted to title this post “Why do people lose their appetite when they’re stressed?”, but then I edited it to “some people”. The change is because this is actually quite subjective; not everyone loses their appetite when they’re stressed. However, it’s true that stress usually shuts down a person’s appetite in the short term, i.e., when one is anxious for a little while.

In this article, we are going to discuss why some people lose their appetite when they are anxious about something (like an examination, an imminent job interview, a breakup etc.). First, however, let’s tackle a more basic question:

Why do we feel hungry?

It’s a pretty straightforward question, isn’t it? We feel hunger when we have not eaten for some time (the exact value of that ‘some time’ varies from one individual to another; some people can last for a day or two without eating anything but water, while others can barely last a few hours before they start munching on something).

Hungry girl in stumach pain

We feel hungry when there is a drop in glucose levels inside our bodies. (Photo Credit : PhotoMediaGroup / Shutterstock)

We eat food because it gives us energy – energy to do the most basic tasks, including reading, writing, walking, dancing etc. Basically, it just keeps our lives going. Humans need a bunch of molecules so that their bodies can do the most basic of operations that sustain life. The most critical of those molecules is glucose.

When your body runs low on glucose, the receptors present in your stomach and intestinal tract send electrical signals to the hypothalamus (a part of the brain). The interpretation of these signals by the brain gives you the feeling of being ‘empty’, or in other words, you feel hungry.

Hypothalamus in brain diagram

The hypothalamus plays a critical role in the control and regulation of hunger. (Photo Credit : BruceBlaus / Wikimedia Commons)

Under normal circumstances, i.e., when you’re not stressed, the aforementioned system works like a well-oiled machine. But when you bring stress into the equation, the dynamics change.

What happens to your hunger when you’re stressed?

Stress and anxiety are a reaction to a perceived danger or stressor. For our ancient ancestors, stressors almost always came in the form of a physical threat to their lives, like a wild lion lurking close by, readying itself to pounce on you. This was, needless to say, a very strong reason to feel stressed.

When such a situation arose, the body entered fight-or-flight mode, which means the subject ether readied themselves to engage in a fight with the lion or run for their lives.

, Why Do Some People Not Feel Hungry When They’re Stressed?, Science ABC, Science ABCToday, thankfully, we’re not under direct physical threats from the beasts of the wild, but it doesn’t mean that there are no stressors present in our lives. The modern world has its own set of challenges and stressors that do a great job of stressing a person out.

Once the body enters the fight-or-flight mode, it turns a ‘blind eye’ towards most of its other not-so-critical needs (like hunger) and focuses all its resources on either directly engaging with the threat (fight) or avoiding it in one way or the other (flight). Therefore, being face to face with a dangerous situation invariably kills one’s appetite for the time being.

, Why Do Some People Not Feel Hungry When They’re Stressed?, Science ABC, Science ABC

From a biological standpoint, when you feel stressed, the hypothalamus produces corticotropin-releasing hormone, which temporarily suppresses your hunger. In addition to that, the brain also sends signals to the adrenal glands (located atop the kidneys) to release the hormone epinephrine, commonly known as adrenaline.

The release of this hormones triggers the fight-or-flight response in the body, which, in turn, temporarily kills your appetite. This is why you don’t feel hungry when you’re stressed or anxious about something.

Help us make this article better
About the Author

Ashish is a Science graduate (Bachelor of Science) from Punjabi University (India). He spends a lot of time watching movies, and an awful lot more time discussing them. He likes Harry Potter and the Avengers, and obsesses over how thoroughly Science dictates every aspect of life… in this universe, at least.

.
Science ABC YouTube Videos

  1. What is DNA and How Does it Work?What is DNA and How Does it Work?
  2. What is the Grandfather Paradox?What is the Grandfather Paradox?
  3. What Is The Highest IQ In The World Ever Recorded?What Is The Highest IQ In The World Ever Recorded?
  4. What are Mutations and what are the different types of Mutations?What are Mutations and what are the different types of Mutations?
  5. Gravitational Lensing: What It Is And How It Is Helping Us Discover New GalaxiesGravitational Lensing: What It Is And How It Is Helping Us Discover New Galaxies
  6. What Exactly is Archimedes Principle: Explained in Simple WordsWhat Exactly is Archimedes Principle: Explained in Simple Words
  7. What is Evolution? A Simple and Brief ExplanationWhat is Evolution? A Simple and Brief Explanation
  8. What is the Heisenberg Uncertainty Principle: Explained in Simple WordsWhat is the Heisenberg Uncertainty Principle: Explained in Simple Words