Why Some Sugary Drinks Leave You Wanting More

By: Agata Blaszczak-Boxe
Pubbed: May 05, 2015 12:58pm ET on LiveScience.

The type of sugar in your drink may affect how much food you want to eat, according to a new study. Researchers found that people wanted to eat more high-calorie foods when they had a drink containing fructose, compared with when their drink contained glucose.

In the study, 24 people were given drinks sweetened with 75 grams of fructose on one day, and the same amount of glucose in a drink on another day. The researchers also showed the people images of high-calorie foods that included candy, cookies, pizza and burgers, and asked the participants to rate how hungry they were and how much they wanted to eat each food.

After consuming fructose, the participants reported feeling hungrier and expressed a greater desire to eat the foods pictured than when they consumed glucose.

The different effects that glucose and fructose seem to have on hunger and people’s desire for high-calorie foods may stem from the different ways each sugar interacts with the hormones that control feelings of satiety, the researchers said.

Unlike glucose, “fructose fails to stimulate hormones like insulin, which provides satiety signals to the brain,” said study author Dr. Kathleen A. Page, an assistant professor of clinical medicine at the University of Southern California. So after the consumption of fructose, the brain may not be receiving the signals that trigger feelings of fullness, she said. [8 Tips for Fighting Sugar Cravings]

In line with previous research, the investigators also found that the levels of insulin in the participants’ blood were significantly lower after they consumed fructose than glucose, according to the study. These differences in insulin levels may help explain the participants’ different responses to food cues after consuming the two types of sugar, the researchers said. In —> Read More