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?
