People with anxiety disorders may share a hidden chemical signature in their brains: lower levels of choline, an essential nutrient most Americans do not get enough of. Researchers at UC Davis Health found that people diagnosed with anxiety had about 8% less choline in key brain regions compared to people without anxiety. The strongest difference appeared in the prefrontal cortex, the area responsible for emotional control and decision making.
A chemical pattern emerges from 25 studies
The finding comes from a meta-analysis published in Molecular Psychiatry, a Nature journal. The research team reviewed data from 25 previous studies that measured neurometabolites, the chemicals involved in brain metabolism. In total, the analysis included 370 people with anxiety disorders and 342 people without anxiety. The standout result was choline. The pattern was consistent across several different anxiety diagnoses, making it the first clear chemical brain pattern linked to anxiety disorders.
Why choline matters for the brain
Choline plays several critical roles in the body. It helps form cell membranes and supports brain functions tied to memory, mood regulation, and muscle control. The body can make a small amount on its own, but most choline must come from food. Foods rich in choline include eggs, beef liver, soybeans, and potatoes. Many Americans do not meet the recommended daily intake. The study suggests that nutritional approaches, such as appropriate choline supplementation, may help restore brain chemistry and improve outcomes for patients.
Anxiety disorders affect millions
Anxiety disorders are among the most common mental health conditions in the United States. Senior author Richard Maddock, a psychiatrist and research professor at UC Davis Health, has spent decades treating people with anxiety disorders and studying how these conditions affect the brain. He noted that anxiety disorders affect about 30% of adults in the United States and can be debilitating. The study offers a rare look at the chemistry that may be connected to anxiety across several different diagnoses.
The discovery does not prove that low choline causes anxiety, but it provides a measurable target for future research. If further studies confirm the link, nutrition based treatments could become a new avenue for helping people with anxiety disorders.
