These oils are used in process foods such as micro-wave popcorn, boxed cakes, TV dinners, etc. Sugar is another food to avoid. Eating too much sugar can lead to insulin resistance which upsets the glucose level in the blood. This may lead to permanent damage to brain cells. Simple carbohydrates turn instantly to sugar within the body.
Some scientist feel that eating white potatoes or white bread is just like eating candy.
Carbohydrates influence mood. There is a delicate balance of the right kind of carbohydrates. Eating complex carbohydrates and avoiding simple carbohydrates insures that the body's carbohydrates are in balance. A modest dose of a variety of vitamins and minerals is regarded as excellent brain insurance. To explain we will use an analogy.