Scientists Find That Ozempic May Be Reshaping Brain Structure and Function
Researchers at the University of Colorado Anschutz discovered that GLP-1 drugs like Ozempic may alter brain circuits involved in attention, emotion, and motivation—not just appetite suppression. The findings raise new questions about the neurological effects of medications now taken by tens of millions worldwide.
Unexpected Brain Changes Discovered
An assistant professor at the University of Colorado Anschutz, she was part of a team studying 13 teens and young women with a hormonal disorder affecting the ovaries who were put on GLP-1 drugs. As part of testing to catalogue the effect of the medication on their bodies, Shapiro took snapshots of their brains before and after. Within only a few months, the brain connections in the salience network, which helps target attention, had multiplied. "We didn't expect to see this effect, and we really don't know what it means," Shapiro said.
Broader Implications for Millions
Ozempic and other GLP-1 drugs were initially understood as a metabolism breakthrough: medicines that act like hormones to control hunger, blood sugar and weight. But as researchers probe deeper into how the drugs work, early evidence suggests that GLP-1s may also be reshaping parts of the brain. Tens of millions of people are now taking the medications worldwide, turning what began as an obesity and diabetes treatment into what could be modern medicine's largest unplanned neuroscience experiments.
Multiple Brain Systems Affected
GLP-1 drugs, best known for helping patients lose weight and control blood sugar, may also be changing brain circuits tied to attention, emotion, motivation, and desire, according to emerging research. In one study of adolescents and young women with a hormonal ovarian condition, researchers found notable changes in brain connectivity after several months of treatment. Scientists studying patients taking the medications have reported changes linked to food cravings, alcohol use, compulsive behavior and attention. Some users have also described emotional flattening, reduced motivation and lower sexual desire.
Potential Medical Applications
The research has implications for addictive behaviors and diseases of aging such as Alzheimer's. The findings remain preliminary, and scientists caution that they do not yet know what the changes mean. Scientists are studying GLP-1 drugs - medications that mimic the hormones involved in appetite, blood sugar and digestion - for how they affect not only eating behavior, but also addiction, cognition, neurodegeneration and even motivation and pleasure.