If you have ever tried to “quit” sugar, you are likely familiar with the logic behind it: If you stop eating sweet things, you will stop craving them. This is a cornerstone of many diet trends and wellness hacks: The idea is that sugar is addictive, and by going cold turkey, you can essentially biohack your taste buds, reset your palate, and eliminate your sweet tooth for good.
As a registered dietitian, I hear this theory constantly. Clients often tell me they are terrified that one cookie will spiral into a sugar bender. Some people I’ve worked with have even been told that sugar is as addictive as cocaine—a claim rooted in studies conducted on rats, which may not fully translate to human behavior.
But a fascinating new study published recently challenges this narrative entirely. It suggests that our preference for sweetness is far more stable—and less hackable—than we thought.
What the science actually says about cutting sugar
The study, published in the American Journal of Clinical Nutrition in 2025 and known as “The Sweet Tooth Trial,” was a robust randomized controlled trial (the gold standard of research) conducted over six months. Researchers divided 180 adults into three groups, assigning each a specific level of sweet taste exposure: low, regular, and high.
The participants followed these diets for half a year, and the researchers measured everything from their “sweet taste liking” (how much they preferred sweet flavors) to their body weight and overall health markers over time.
The hypothesis? That the people eating the low-sugar diet would lose their taste for sweets, while those in the high-sugar group would start craving sweeter and sweeter foods.
The reality? Nothing changed.
After six months, the researchers found no difference in “sweet taste liking” between the groups. The people who restricted sweet tastes didn’t start disliking sugar, and the people who ate a high-sweetness diet didn’t develop a heightened preference for it. Further, there were no significant changes in body composition or health markers like insulin sensitivity purely based on sweet taste exposure.
This aligns with a recent review published in the British Journal of Nutrition, which analyzed multiple studies and concluded that exposure to sweetness doesn't drive a sweet tooth. While we have long been told that eating sugar makes you want more sugar, the empirical data just doesn't back that up.
Why it might feel like cutting sugar works
This might be confusing, especially if you have personally tried cutting out sweets and felt your cravings diminish. I have experienced this myself, and I have seen clients go through it too. If the science says our preference for sweetness is stable, why does cutting it out often feel like a magic fix, at least temporarily?
There are a few physiological and psychological reasons why you might feel less beholden to the candy bowl when you abstain, even if your brain's “liking” for sugar hasn't actually changed.
While your preference for sweet things might stay stable, your perception of intensity can shift. When you eat less sugar, your taste buds can become more sensitive. That piece of dark chocolate might taste much sweeter than it used to. This doesn’t mean you don’t like sweet things anymore; it just means you are now getting the sensory hit you enjoy from a smaller amount or a less concentrated source.
When people eat sweets without consuming protein and fiber alongside them, many of the urgent, frantic cravings we feel are actually just physiological hunger or blood sugar crashes. Eating more balanced foods can result in fewer feelings like this.
This is the psychological side of cravings, and is also referred to as the ironic process theory. Sometimes, having a strict rule (like “I don't eat sugar”) removes the mental load of decision-making. You stop negotiating with yourself about whether to have the donut, which can temporarily reduce the noise in your head. However, this is usually a short-term fix. As soon as the restriction feels too heavy, the “forbidden fruit” effect kicks in, often leading to a rebound binge.
Ever felt full after a meal but still had room for dessert? That’s not just willpower failing. In fact, it’s something called sensory-specific satiety, also known as the “dessert stomach.” After we eat a meal, even if we feel full, our bodies can still find “space” for dessert. Specifically, it seems we’re wired to want more, especially when it comes to carbs.
This instinct isn’t random. The reality is that it may have evolutionary roots. When food was scarce, our bodies were driven to take in extra calories, especially energy-rich carbohydrates, whenever they were available. Having room for dessert, even after a filling meal, could have helped our ancestors maximize their energy stores during times of abundance. So craving something sweet after eating isn’t a sign your sweet tooth is out of control; it’s a natural survival mechanism that encourages us to eat a variety of foods and seek out quick energy when it mattered most.
How to handle a sweet tooth (without the biohacks)
The findings of the Sweet Tooth Trial can be liberating. They suggest that we don't need to fear sweet food as a substance that will hijack our brains. If eating sugar doesn't inherently make you crave more sugar, then you don’t need to treat it like a dangerous drug. You can just treat it like food.
Here are better ways to navigate sweet cravings when they come in fiercely:
Humans are hardwired to enjoy sweet tastes; it is an evolutionary survival mechanism that helped our ancestors seek out energy-rich foods. Trying to biohack this away is fighting biology. Instead of judging yourself for wanting dessert, accept that it is a normal part of the human eating experience. But also know that you may not need these sweets as often as you may think.
If you are eating sweets but still feel unsatisfied or out of control, look at the rest of your plate. Are you eating enough protein at lunch? Did you skip breakfast? A nagging sweet tooth is often a sign of under-fueling earlier in the day. Instead of taking the chocolate away, try adding a handful of almonds or a greek yogurt to the mix to support satiety.
The study showed that even high exposure to sweets didn't ruin people's health markers or body weight in isolation. For some, when you stop putting sweets on a pedestal, they lose their power over you. You might find you can eat one cookie and move on, simply because you know you are allowed to have another one whenever you want.
The bottom line
The takeaway here is simple: Managing a sweet tooth isn’t about fighting biology or chasing the perfect “biohack.” It’s not about trying to eliminate your sweet tooth altogether, either—it’s about understanding it. The Sweet Tooth Trial shows that our preference for sweetness is a stable trait, not something we can erase through restriction or willpower alone. Instead of fearing sugar or treating it like a dangerous substance, we can see it for what it is: a source of energy and enjoyment, but not one that needs to dominate (or should dominate) our plates.
This doesn’t mean sweets are “bad” or that you need to obsess over moderation. It’s about the bigger picture. Sweets are just one part of your overall diet, and while they don’t offer much nutritionally beyond calories, they can still have a place in a balanced, satisfying way of eating when enjoyed in moderation. By focusing on fueling your body with enough protein, fiber, and other nutrients, you’ll naturally feel more in control of cravings, which may help you curb your sugar cravings over time.
So enjoy that cookie or piece of chocolate when you want it. The key is to stop putting sweets on a pedestal and start treating them like any other food. After all, food is meant to nourish not just your body, but your life.
Related:
- 7 Lifestyle Habits to Pick Up in Your 30s if You Want to Live Longer
- 10 High-Magnesium Foods for Better Sleep and Stronger Bones
- Here’s Why You Feel So Much Hungrier in the Winter
Get more of SELF’s great service journalism delivered right to your inbox.
