Uridine makes you hungry

Study on volunteers finds new regulator of food intake

Uridine is not only a central building block of RNA, but can also increase the feeling of hunger when ingested, as researchers at the Max Planck Institute for Metabolism Research and the University Hospital of Cologne have now shown. In the long term, uridine could be a potential target for therapeutics against eating disorders in humans.

Uridine is known primarily as a precursor for RNA, but also plays a central role in many other processes in the body. In mice, researchers at the Max Planck Institute for Metabolism Research found several years ago that uridine has an important function in controlling feeding behavior.

"We wanted to know whether uridine also controls eating behavior in humans. In humans, however, such studies are much more complicated because, for example, social interaction has a major influence. When other people observe what we eat, it can cause us to change our eating behavior," explains Ruth Hanssen, one of the study's first authors. To minimize this influence, the volunteers were separated from each other before being given uridine orally. The volunteers were then allowed to eat as much as they wanted during the day and were asked to indicate how hungry they felt. They also had blood drawn to measure how much uridine was present in their blood.

Increased hunger after uridine intake

The researchers were able to demonstrate that the subjects were significantly hungrier after taking uridine and also consumed more of the food offered. The effect was particularly strong when uridine was administered in doses that were not too high.

"We now know that uridine can also control food intake in humans. It may also be able to help increase the feeling of hunger in patients with eating disorders as a dietary supplement. However, we do not yet know whether the effect of uridine is strong enough to overcome the psychological causes. More clinical studies are needed for this," Lionel Rigoux, the other first author of the study, explains.