4. Vegetable Oil
You would think that vegetable oil is healthy based on its source, but once again, it is the processing that makes it dangerous. Oil cannot be extracted naturally from vegetables, but instead goes through a process that hydrogenates the end product.
Hydrogenated oils contain trans fats that can lead to cardiovascular disease, obesity, cancer, and Alzheimer’s disease. Vegetable oil is in all kinds of baked goods and packaged foods, so limiting these will automatically help reduce your intake. Better choices to use at home include olive, avocado, and coconut oils.