These are vegetable oils. They must be chemically removed from their source and are often deodorized and colored. Also, excessive Omega-6 fatty acids cause health problems.
12. Red Meat
Small amounts of red meat in a diet can be shown to be a good thing. Try to eat grass fed which has properties of linoleic acid which helps fight against some cancers. However, when speaking about colon cancer, red meats eaten everyday can lead to increased cancer risks.