The human brain is made primarily out of fat and believe or not, cholesterol. Cholesterol is an insulator, and so just like rubber on a wire your brain uses cholesterol to keep electrical signals insulated from one another. Which is why in our society, of course are better as want us to do away with fat and a cholesterol.
wow, my speech to text did a number on that. I meant to say that our betters want to do away with our eating of fat and cholesterol.