We are all aware of the cardiovascular problems created by high levels of trans fat.  A new study published in the journal  Neurology found that people with higher levels of trans fats in their blood may be 50% to 75% more likely to develop Alzheimer's disease or dementia from any cause. Read more 

Artificial trans fats, or trans fatty acids, are made when vegetable oil hardens in a process called hydrogenation. Those hydrogenated fats can be used in fried foods, snack foods or baked goods, and in products such as vegetable shortening, stick margarine, coffee creamer, cakes, pie crusts, frozen pizza, cookies, crackers, biscuits, dozens of other processed foods and ready-to-use frosting. They don't spoil as quickly as other fats, but they can have some harmful health effects, such as raising levels of "bad" LDL cholesterol and increasing risk of heart disease, stroke and type 2 diabetes. The food industry loves trans fats because they are cheap to produce, last a long time and give foods a great taste and texture.