"Brain chemistry" refers to the chemicals and processes in the brain that control our thoughts, emotions, and actions. It's how different substances in the brain work together to help us think, feel, and behave in certain ways. Full definition
Animal testing indicates that pesticides can cause permanent changes in brain chemistry that may lead to behavioral disorders, learning disabilities, and even long - term damage to the brain and nervous system. (babycenter.com)
The lack of good bacteria can also negatively alter brain chemistry, causing depression and anxiety. (detoxdiy.com)
For the first time, researchers have demonstrated that probiotics have a direct effect on brain chemistry under normal conditions. (articles.mercola.com)