Did you know that your brain prefers fat as its primary source of fuel? But it can’t be just any fat. It has to be the good kind. Avocados are high in oleic acid, which is a type of monounsaturated fat that fights brain cancer and tumors, aids in memory, and boosts brain function. Avocados can be added as a thickening agent in smoothies in place of bananas if you are on a low-carb diet. They are also great in salads or eaten in the form of guacamole. Some people even bake desserts with them!