Hydrogenated oil. It is very bad for the health and should be avoided at all means. It can be found in margarine, some peanut butter, butter and so on.
Family history is the top risk factor for a person to get an Alzheimer's disease. This is because of heredity that a person cannot escape from. So it is important that a person must know the family history whether he or she can be a dominant carrier of this disease or not.