Cravings, willpower, and the secret to lasting weight loss

If you’ve ever tried to lose weight, you probably know the scenario all too well. You set your mind to a diet, stick with it for a few weeks, maybe even a few months, and the pounds start to drop. But then it happens: the siren song of chocolate cake, pizza, or chips becomes irresistible. One indulgence leads to another, and before long, much of the weight has crept back.

What if the secret to long-term weight loss isn’t just about counting calories or cutting carbs, but about reshaping the cravings themselves? That’s exactly the question researchers at the University of Illinois at Urbana-Champaign set out to answer. Their study, published in Physiology & Behavior, offers hopeful news: food cravings don’t just shrink during weight loss, they can stay lower for years, helping people keep the weight off.

The research, conducted by Nouf W. Alfouzan and Manabu T. Nakamura, tracked 30 adults over two years. The participants joined an online dietary program called EMPOWER, an adaptation of an in-person course known as iDip. Instead of prescribing rigid meal plans, EMPOWER focused on education: teaching participants how to spot the nutrients in foods, make balanced choices, and most importantly, manage cravings without feeling deprived.

Before diving into the results, it’s worth pausing on why cravings are so powerful. Unlike hunger, which is the body’s general request for fuel, cravings are precise and demanding. Hunger can be satisfied with a sandwich or a salad. A craving, on the other hand, insists on that cookie or those fries.

Cravings are especially tricky because they often target high-calorie, highly processed foods, things like sweets, fried snacks, and fast food. These foods deliver quick bursts of pleasure to the brain, which reinforces the habit of reaching for them when stressed, bored, or tired. Over time, cravings become a reliable predictor of weight gain and a major obstacle for anyone trying to stick with healthier eating.

This explains why diets so often fail in the long run. Even if someone manages to lose weight in the short term, the cravings usually remain, and sooner or later, they win. The Illinois team wanted to know: could cravings themselves actually change during weight loss and maintenance?

The study followed participants for 24 months, 12 months of active weight loss, followed by 12 months of weight maintenance. Every six months, participants filled out questionnaires about their cravings, rating how often they felt urges for specific foods like sweets, fast food, or starchy carbs. And their findings are worth our attention. During the first year, cravings for sweets, carbs, and fatty foods dropped significantly. And here’s the twist: those reduced cravings didn’t bounce back when the formal “dieting” phase ended. They stayed lower throughout the second year, even with much less direct support from coaches.

By the end of two years, the participants who had lost and kept off at least 5% of their body weight showed the most dramatic drop in cravings. Meanwhile, those who didn’t achieve significant weight loss reported little to no change in cravings over time. In other words, successful weight loss and reduced cravings seemed to feed each other in a virtuous cycle. You lose weight, then cravings go down, and so it's easier to maintain the weight loss.

One of the cleverest parts of the program was what the researchers called the inclusion strategy. Instead of telling people to ban their favorite indulgences, participants were encouraged to include small amounts of those foods within balanced meals. Think of it like this: rather than white-knuckling your way past the dessert table forever, you might have a small piece of chocolate after dinner, paired with fiber-rich vegetables and a protein source. That way, the craving is acknowledged but doesn’t spiral into a binge. The data backed this up. Participants who practiced inclusion lost more weight and reported fewer cravings for sweets and high-fat foods compared to those who tried to avoid them completely.

It’s a refreshing way to think about the discourse around diet usual “all or nothing” mentality. Sometimes, a little chocolate can actually help you stay on track.

Why do cravings drop after weight loss?

The study also suggested why they might be happening. One theory involves insulin sensitivity. Excess body fat often goes hand-in-hand with insulin resistance, which can affect the brain as well as the body. When the brain is less sensitive to insulin, dopamine-driven cravings for high-calorie foods are stronger.

Lose fat, regain insulin sensitivity, and the brain’s “reward” response to sweets and junk food seems to calm down. Other studies have shown that giving people intranasal insulin (a spray that delivers the hormone directly to the brain) can actually reduce sweet cravings. The Illinois findings fit neatly into that picture: by reducing body fat, participants may have improved their brain’s insulin signaling, which in turn dampened cravings.

Behavior matters too

Of course, biology is only part of the story. The EMPOWER program also emphasized practical tools for managing cravings, such as changing the environment (keeping tempting foods out of sight or harder to reach), using distraction strategies (finding something else to do when a craving hits), aiming for consistency (eating regular meals instead of letting hunger spikes drive impulsive snacking), and focusing on protein- and fiber-rich food (choosing foods that keep people fuller for longer).

Participants who embraced these techniques, especially inclusion, fared the best.

The impact of this study is even more significant if observed in context. Obesity is one of the defining health challenges of our time. In the U.S., more than 40% of adults live with obesity, and most people who lose weight struggle to keep it off for more than a year or two. Traditional diets often fail not because people lack discipline, but because biology and psychology are stacked against them. By showing that cravings themselves can change, and stay lower, the Illinois study offers a hopeful counterpoint. It suggests that successful weight loss isn’t just about pushing through endless temptation. Over time, the temptation itself may fade, especially with the right strategies.

That could change how programs are designed. Instead of rigid bans and quick fixes, long-term success might hinge on teaching people how to live with cravings, not fight them head-on.

So what does this mean if you’re trying to lose weight or just eat healthier? A few lessons stand out. First, expect cravings to change. They won’t necessarily plague you forever, many people find they naturally shrink after sustained lifestyle changes. Second, don’t demonize favorite foods. Including small portions in balanced meals may help more than total restriction. Third, focus on balance, not extremes. Fiber, protein, and steady eating patterns help tame cravings. Fourth, think long-term. The real victory isn’t just losing weight in six months, it’s keeping it off two years later.

Weight loss will probably never be simple, but this study shows it doesn’t have to be a battle of willpower against cravings forever. In fact, the cravings themselves may quietly retreat, leaving room for healthier habits to take root and stay.

If you want to learn more, read the original article titled "Reduced food cravings correlated with a 24-month period of weight loss and weight maintenance" on Physiology & Behavior at http://dx.doi.org/10.1016/j.physbeh.2025.114813.