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June 7, 2025 — For years, many have believed that indulging in sugary treats only fuels a growing “sweet tooth,” making it harder to resist desserts and sweet snacks in the future. But a new study from Wageningen University in the Netherlands is challenging that popular notion, suggesting that our preference for sweetness is surprisingly stable—no matter how much sugar we eat.
The Study: Testing Sweetness Over Time
Researchers at Wageningen University set out to answer a long-standing question: Can eating more (or less) sweet-tasting foods actually change how much we like sweetness? To find out, they recruited about 180 adult volunteers and divided them into three groups. Each group followed a different diet for six months: one high in sweet foods, one low in sweet foods, and one with a balanced mix.
Participants received packages of specially selected foods and drinks—ranging from jam, milk chocolate, and sweetened dairy to ham, cheese, and salted popcorn—making up about half of their daily meals. Their preference for sweet tastes was measured before, during, and after the diet, as well as one and four months later.
Key Findings: Sweetness Preferences Stay the Same
The results? No matter how much sugar participants consumed, their liking for sweet flavors didn’t budge. Those who ate more sweets didn’t develop a stronger craving, and those who cut back didn’t lose their taste for sugar.
“We also found that diets with lower or higher dietary sweetness were not associated with changes in energy consumption or body weight,” said Dr. Kees de Graaf, emeritus professor in sensory science and eating behavior at Wageningen University. “Even though many people believe that sweet foods promote higher energy intake, our study showed that sweetness alone isn’t to blame for taking in too many calories.”
Why This Study Stands Out
Most previous research on this topic only looked at short-term effects—sometimes just a single day. This new study, however, lasted six months and used a carefully controlled, ethics-approved protocol. Researchers also tracked participants’ energy intake, body weight, and health markers like glucose and cholesterol, finding no significant changes linked to the amount of sweetness in their diets.
What’s Next?
While the study focused on adults, the researchers are curious whether children’s taste preferences might be more flexible. If so, early dietary habits could play a bigger role in shaping lifelong eating patterns.
The findings were presented at NUTRITION 2025, the annual meeting of the American Society for Nutrition, and detailed in a press release by Wageningen University.
Disclaimer:
This article is based on a recent study reported by Earth.com and conducted by Wageningen University. The findings are intended for informational purposes only and should not be interpreted as medical advice. Dietary needs and health conditions vary; consult a healthcare professional before making significant changes to your diet.
