A six-month trial involving 180 participants published in the American Journal of Clinical Nutrition reveals that cutting sweet foods from a diet does not alter sweet taste preferences, reduce cravings, or significantly change markers for heart disease and diabetes.
Public health guidelines from organizations like the World Health Organization have long encouraged individuals to reduce sweet-tasting foods to combat obesity and dietary health issues. Yet a recent clinical study puts that foundational assumption to the test, finding that human sweetness preferences remain remarkably stable during adulthood regardless of dietary modifications.
Putting the Sweet Tooth to the Test Over Six Months
Researchers at Wageningen University and Research in the Netherlands and Bournemouth University in the UK recruited 180 participants to evaluate the physiological and psychological impacts of altering sweetness in daily meals. The trial divided participants into three distinct groups for a duration of six months. One cohort followed a diet high in sweet-tasting foods, a second group consumed a low-sweetness diet, and a third maintained an average level of sweetness. The sweet tastes in these diets derived from a mix of natural sources, sugar, and low-calorie sweeteners.
Throughout the trial, investigators checked in on participants at one, three, and six months to track shifts in taste perception and food liking. Researchers also collected blood and urine samples and monitored body weight to assess cardiovascular health and diabetes risk markers. At the end of the six-month period, the researchers found no significant differences among the three groups in any examined health or preference measures.
The study highlights a critical distinction that public health messaging often blurs: sweetness and sugar are not the same thing. A food can taste sweet due to low-calorie sweeteners or naturally occurring components like those found in fresh fruit, which also delivers essential fiber, vitamins, and minerals. Conversely, many highly processed or fast-food items may lack a distinctly sweet profile while hiding substantial amounts of added sugars and dense calories.
“People have a natural love of sweet taste which has led many organizations, including the World Health Organization, to offer dietary advice on reducing the amount of sweetness in our diets altogether,”
Photo: Sciencedaily
Professor Appleton added that the study’s results do not support this advice, as it fails to consider whether the sweet taste is derived from natural sources, sugar, or low-calorie sweeteners.
Energy-dense foods pack a high number of calories into a small serving size, typically driven by added fats and sugars. Because simply eliminating sweet tastes fails to suppress cravings or improve key metabolic markers, researchers argue that dietary guidance should pivot away from broad bans on sweetness and focus instead on overall caloric density and sugar intake.
Navigating Cravings When Cutting Sweets Fails
For individuals struggling to scale back on sugary items, these findings can feel simultaneously vindicating and frustrating. Cravings for sweets are rarely solved by willpower alone, as underlying physiological triggers often drive the sudden desire for quick energy.
