A new brain study on the effects of two different kinds of sugar suggests that consuming glucose–but not fructose–may help you feel fuller.
In the study, published in the Journal of the American Medical Association, researchers looked at the brain MRIs of 20 adult subjects after they consumed a drink made from one of the two sweeteners. Those who consumed the glucose had reduced activity in the area of the brain involved in controlling appetite, motivation and reward processing. After the drink, subjects reported that they felt satisfied.
The subjects who ate fructose, the sweetner typically used in soft drinks, energy drinks, and sugary snacks, did not experience the same physiological effects. Instead, researchers found fructose consumption to be associated with lower levels of insulin and GLP-1—hormones that help the body feel full.
The findings imply that “advances in food processing and economic forces leading to increased intake of added sugar and accompanying fructose in U.S. society are indeed extending the supersizing concept to the population’s collective waistlines," according to a JAMA editorial that accompanied the study.