Plant-based diets appear to influence psychological state positively. Vegetarians can show fewer symptoms of depression, anxiety, stress, and mood disturbance than omnivores. Higher levels of antioxidants within the blood from plant sources are related to a significantly lower risk of depression, and lower suicide rates are tied to higher consumption of fruit, vegetables, nuts, and soy and lower intake of dairy, meat, and fish.Chicken has been linked to a spread of neurological and psychiatric conditions. Arachidonic acid, found at particularly high levels in chicken and eggs, produces inflammatory compounds which will affect our brains. Chicken has low levels of omega 3 carboxylic acid, an important nutrient for the brain. Toxoplasma brain parasites from meat are linked to schizophrenia and bi-polar disorder. Glycotoxins are found primarily in chicken, pork, beef, and fish increase the danger of dementia and Alzheimer's. High consumption of fish has been related to an increased risk of mental disorders, lower testosterone which can cause depression, and chronic fatigue syndrome and depression.Frequent ingestion of the synthetic sweetener, aspartame, may increase risk of depression and other mental disorders.