What Contributes to Appetite?

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Intermittent fasting can reduce the spikes and crashes that can intensify appetite.

Containment occurs naturally because you keep your eating time within a reliable window.

The benefit is not just about eating less; it is about thinking less about eating.

As a psychologist who has spent over 30 years breaking free from anxiety and overthinking, what fascinates me most about intermittent fasting isn't just the metabolic research, but what happens with the mind.

Most people discover something unexpected: they are much less hungry. This is not because they are using more willpower. It's not that they are distracting themselves. Rather, and this is huge, the mental noise about food gets much quieter.

Quieting the "I Must Eat Now" Loop

In a culture that encourages us to eat all day long, hunger has become a near-constant signal, along with the internal dialogue that precedes it. "Hmm, should I just eat now?" "I guess I can eat this and I will just eat less later." "Well, I already blew it for today, and I deserve a treat anyway."

That maddening mental loop pattern is identical to the overthinking loops I describe in my book, Freeing Your Child From Overthinking. The brain keeps scanning, correcting, and trying to create certainty (e.g., "This food will certainly hit the spot now!"). The result is exhaustion and a "feed me now" response that makes certain we eat because we think we "need" to have that food right then and there.

The Little Talked About Magic of Intermittent Fasting

When our eating is confined to a fixed time window, powerful things happen. There are obviously fewer decisions about when we will eat. There are fewer back-and-forth internal debates about food. And, there are fewer faulty "self-corrections" driven by emotional eating drivers such as boredom, frustration, and let's not forget that big one—anxiety.

The magic part of these intermittent fasting time windows is that they lead us to fewer food-related decisions, less internal, emotionally driven, civil war over eating or not, and fewer "self-corrections" in favor of the "certainty" of getting to eat when it is not in our best health interests. In plain English, "hunger" becomes less urgent and more predictable.

The Magic Behind Reduced Overall Appetite From Intermittent Fasting

We are in an age where many people are thrilled with prescribed GLP-1 meds that reduce hunger. I am not advising anyone to forgo prescribed meds in favor of intermittent fasting. Always check with your health care provider about what is best for you.

With that said, biologically speaking, intermittent fasting also leads to a steadier eating rhythm that can reduce the spikes and crashes that can intensify appetite. But just as important as the psychological shift, the brain gets retrained to perceive that hunger is not an emergency. Intermittent fasting has a beginning, a middle, and an end. This eating predictability lowers threat, and that lower perceived threat reduces rumination about food.

What Contributes to Appetite?

Take our Emotional Eating Test

Find a therapist near me

PACE Your Way to Quieting Those Hunger Madness Loops

In my counseling work, I teach the PACE model from my book, Freeing Your Child From Overthinking. I have seen this model greatly promote impulse control for children, teens, and adults when it comes to challenging behaviors, runaway thoughts, and overpowering emotions. PACE stands for pause, acknowledge, contain, and engage. A flexible, non-rigid approach to intermittent fasting mirrors that process:

Pause and gently remind yourself that you are on an intermittent fasting plan when you feel hunger outside your eating window (common fasting plans are 14, 15, or 16 hours).

Acknowledge your hunger in a nonjudgmental way. "I am hungry, but I have a plan that helps me stay in control of my hunger instead of it continuing to control me."

Containment is naturally occurring because you keep your eating time within a reliable window.

Engage with food more intentionally and with less urgency as you reflect on the predictability your intermittent fasting program offers.

Intermittent fasting is not appropriate for children, teens, people with certain health conditions, or those with a history of disordered eating. It works best when there is some cognitive flexibility around it rather than rigidity; otherwise, it can precipitate even more overthinking. Yet, for many adults, the benefit is not just about eating less; it is about thinking less about eating.

Again, intermittent fasting is not for everyone, so please consult your health care provider about the options that are best for you for managing food cravings, nutritional requirements, weight control, and overall health.

© Psychology Today