Well, literally everything. Every cell in your body is partly made up of these essential fatty acids. To breathe, to have your heart beat, to run, walk, think, to make hormones, to remember anything, you need essential fatty acids for all of these and basically, to live. And if you don't eat them in the food you eat, your body will not function properly. And the only place you can find essential fatty acids is in food that has naturally occurring fat in them. So if you try and cut fat out of your body, you will actually be causing harm and not really be doing anything to get rid of the fat already in your body. Resurge