Plant-based diets appear to influence mental health positively.
Higher levels of antioxidants in the blood from plant sources have been associated with a significantly lower risk of depression, and lower suicide rates have been tied to higher consumption of fruit, vegetables, nuts, and soy and lower intake of dairy, meat, and fish.
Chicken has been linked to a variety of neurological and psychiatric conditions. Arachidonic acid, found at particularly high levels in chicken and eggs, produces inflammatory compounds that may affect our brains. Chicken has low levels of omega 3 fatty acid, a vital nutrient for the brain.
Toxoplasma brain parasites from meat have been linked to schizophrenia and bi-polar disorder. Glycotoxins—found primarily in chicken, pork, beef, and fish—increase the risk of dementia and Alzheimer’s.
Frequent ingestion of the artificial sweetener, aspartame, may increase risk of depression and other mental disorders. Artificial coloring in foods may increase impulsivity, inattentiveness and hyperactivity in children.
Children whose mothers ate more licorice during pregnancy were more prone to attention, speech, and visual-spatial ability problems.