The Scientific Explanation Behind Your Constant Hunger—and How to Control It

It's a familiar scene during the holidays. You sit back in your chair, feeling like you could barely move after indulging. You swear you can't eat another bite, that you'll never want food again. Then, someone casually mentions the word: 'pie.' Suddenly, the golden crust and the tempting scent of brown sugar and pecans have you reconsidering. Of course, you'll have some pie!

What you're feeling has a scientific name, and it’s not gluttony. It’s known as hedonic hunger—the urge to eat for pleasure rather than to satisfy your body's energy needs. Why do we crave foods our bodies don’t require? Because the rich, indulgent taste of fatty, buttery, sweet, and savory foods activates the brain's reward system, making us want more even when our stomachs are already full.

Your Brain Craves the Food—Not Your Body

Think back to the last time you ate so much steamed broccoli that you could barely move, but still kept going back for more? Probably not. Hedonic hunger is triggered by calorie-dense, pleasurable foods—anything that's fried, fatty, salty, or sweet. When our early ancestors were foraging for nuts and berries, hedonic hunger didn’t exist. But once someone discovered how to churn milk into butter, and someone else realized potatoes are incredible when fried in hot oil, everything changed.

'As humans evolved, our tastes shifted from 'This tastes awful but will keep me alive' to 'This tastes good' to 'Wow, this is incredibly delicious.' It makes it tough to resist,' says Michael Lowe, PhD, a psychology professor at Drexel University who coined the term hedonic hunger to distinguish it from homeostatic hunger, which arises from your body’s need for energy (that familiar rumble in your stomach when you’re hungry).

'When we eat something delicious, our brain releases dopamine, a neurotransmitter that's part of the brain's reward system,' says Lowe. 'It makes us feel good, which is why we keep eating to chase that feeling.' (This could also explain stress eating and the well-worn habit of reaching for brownies when we're feeling down.) Over time, Lowe explains, the brain adapts, so just the anticipation of eating that food triggers a dopamine rush: 'That's why I called it hedonic hunger. It’s a hunger for pleasure, not for calories.'

We're Surrounded by Constant Environmental Temptations

Unlike the homeostatic hunger that signals our bodies' need for food, hedonic hunger is mostly triggered by external factors. It could be the sight of rich chocolate sauce, the irresistible aroma of fresh pizza, or simply sitting down in front of the TV with a bowl of ice cream if that’s your go-to treat spot.

'I walk past a Starbucks, and that pumpkin latte smell hits me from outside—plus, there are posters everywhere, making it impossible to resist,' says Surabhi Bhutani, PhD, assistant professor of nutrition at San Diego State University’s School of Exercise and Nutritional Sciences, whose research focuses on how scent and taste perceptions affect diet and weight gain. Throw in cooking shows, fast food ads, and tempting holiday commercials, she adds, and you've got nearly constant triggers for cravings.

The Impact of 'The Variety Effect'

What else makes us more likely to eat for pleasure? Having a wide range of options at our fingertips. The more choices we have, the more we’re inclined to eat, a behavior known as the variety effect. Working alongside it is sensory-specific satiety: Picture yourself eating all the brisket and green beans you can handle, and the joy of those first bites starts to fade. Then, a slice of cheesecake appears, offering a new burst of flavor—and suddenly, you have 'room' again.

If this whole scenario is making you feel like a lab rat (or Templeton the rat from Charlotte’s Web, stuffing himself at the county fair), don’t be too hard on yourself. It turns out, even nutrition scientists fall into the same trap. 'When I’m at a hotel buffet, I might start with the dish that catches my eye, but then sensory-specific satiety takes over,' says Bhutani. 'And before I know it, I’m eyeing 10 other delicious options and since I haven’t reached full satisfaction yet, I end up putting them on my plate too.'

If your holiday meals typically involve a little extra mac and cheese, a cookie here, some reheated stuffing there, and a handful of chocolates, that’s the variety effect in full swing.

The Illusion of Self-Control

We all face the same sensory triggers, but some people are more driven to act on their hedonic urges. However, this isn’t about a lack of self-discipline, according to Lowe.

A 2016 study published in the Journal of Nutrition found that people who frequently experience hedonic hunger showed more activity in the brain’s reward centers when presented with tempting food, compared to those who were less driven by cravings. The research suggests that dopamine, hunger hormones like ghrelin and leptin, and our endocannabinoid system—responsible for regulating eating, memory, emotion, and sleep—play a complex role. Lowe explains that some people’s stronger neural responses to food might be linked to genetic differences. 'It’s clear that a person’s genetic makeup can make it harder for them to manage food intake,' he says. 'But this is still a new frontier of research.'

One aspect that isn’t necessarily connected to hedonic hunger is body mass or weight. In the Journal of Nutrition study, heightened hedonic activity didn’t correlate with any specific BMI level. An analysis of 50 studies by Lowe and his team did show a modest link between hedonic hunger and higher weight, but the correlation was weaker than they had anticipated.

Strategies to Combat Overeating and Tame Hedonic Hunger

There's absolutely nothing wrong with craving tasty food. Enjoy the holiday season, savor the meals you love, and share them with people you care about. But if you find yourself wishing you could ease those cravings a little, here are a few tips that might help curb the urge to eat everything in sight. They may seem like familiar advice (mmm, roasted chestnuts), but that’s because they’ve been backed by solid research over time.

1. Strive for 7 to 8 hours of sleep each night.

Research has shown that the brain’s reward centers become more sensitive to cravings when people don’t get enough sleep (less than six hours a night). The more sleep-deprived you are, the more likely you are to crave high-sugar, high-fat foods. In a 2019 study, Bhutani and her team discovered that just one night of missed sleep made participants more susceptible to the temptation of indulgent foods.

2. Manage your stress and recognize your triggers.

While a single stressful event, like a bad breakup, can actually reduce hedonic eating, chronic stress tends to have the opposite effect and can trigger stress eating (something familiar if you’ve ever gone through a stressful work period). If stress is pushing you to eat more than necessary, try swapping that stress-eating habit for something else: opt for a walk, a meditation session, or a yoga class instead of heading for the vending machine. It might not give you the same quick satisfaction as a bag of Funyuns, but Future You will appreciate it.

3. Reflect on your habits.

'First, ask yourself questions like, 'When do I tend to crave high-calorie foods? Is it with certain people? In specific situations? Or when I’m scrolling through social media?' says Bhutani. Then, try to visualize the outcomes: 'If I go through with this, how will I feel afterward? Guilty? Bad about myself? And if so, what would happen if I chose not to act on the urge?'

'This kind of mindfulness can be tough, but with persistence, it’s been proven to be an incredibly effective tool in managing hedonic hunger and overeating,' says Bhutani.

4. Try a visualization exercise.

Imagine yourself in The Bahamas. Or Disneyland. Or anywhere you’d rather be when that craving strikes. 'The goal is to picture yourself doing something enjoyable, but unrelated to food,' Bhutani explains. In a 2021 study published in the journal Appetite, participants who craved chocolate were asked to picture their favorite chocolate in front of them. They were then told either to let their minds wander or to visualize sitting peacefully by a stream, watching leaves drift by. Those who chose the latter found that the urge to devour the chocolate diminished afterward.

5. Get moving.

Engaging in regular moderate-to-vigorous physical activity has been shown to reduce cravings for high-fat foods. It can also help curb overeating: In a 2021 study, overweight or obese women who exercised for about 190 minutes per week (a bit less than 30 minutes a day), using either a treadmill or elliptical machine, reported a significant decrease in their desire to overeat, and this effect lasted over a three-month period.

6. Consider therapy to explore and change your habits.

If disordered eating, overeating, or stress-induced eating is disrupting your life and well-being, therapy could be a helpful solution. 'Cognitive behavioral therapy has proven effective for binge-eating disorders,' says Lowe. 'Other therapeutic approaches, such as mindfulness-based, dialectical behavior, and acceptance and commitment therapies, can also support you in learning how to manage strong urges and emotions without acting impulsively.'