Researchers at UC Davis Health have identified a consistent chemical difference in the brains of people with anxiety. A meta-analysis published in the journal Molecular Psychiatry reviewed 25 datasets from 24 published studies using proton magnetic resonance spectroscopy, a specialized MRI technique that measures brain chemistry. The studies included 370 people with anxiety disorders and 342 people without anxiety, focusing on generalized anxiety disorder, panic disorder, and social anxiety disorder.
Key Findings
The analysis found an 8% average reduction in choline-containing compounds in the brains of people with anxiety disorders. The difference was especially consistent in the prefrontal cortex, a region involved in planning, emotional control, decision making, and regulating behavior. Choline stood out as the most consistent difference across anxiety disorders compared to other neurometabolites examined, including N-acetylaspartate, creatine, myo-inositol, glutamate, glutamine, GABA, and lactate.
Jason Smucny, co-author and assistant professor in the Department of Psychiatry and Behavioral Sciences, stated that “this is the first meta-analysis to show a chemical pattern in the brain in anxiety disorders. It suggests nutritional approaches, like appropriate choline supplementation, may help restore brain chemistry and improve outcomes for patients.”
Choline’s Role
Choline helps build cell membranes and supports brain processes involved in memory, mood regulation, and muscle control. It is linked to acetylcholine, a chemical messenger important for learning and attention. The body can make small amounts of choline, but most must come from food. Good dietary sources include eggs, salmon, meat, poultry, soybeans, and some cruciferous vegetables. Research has found that most people in the United States do not get the recommended amount of choline.
The researchers suggest that if anxiety keeps the brain in a prolonged state of alert, it may raise the demand for choline-related compounds faster than the brain can replace them. Senior author Richard Maddock noted that anxiety disorders are the most common mental illness in the United States, affecting about 30% of adults. However, he cautioned that the findings do not prove low choline causes anxiety or that supplements can treat anxiety disorders. “We don’t know yet if increasing choline in the diet will help reduce anxiety. More research will be needed,” Maddock said.
This article is an AI-assisted summary. All facts and figures are drawn from the original report: https://scitechdaily.com/a-common-nutrient-may-play-a-surprising-role-in-anxiety/