Oooo, let me try. You can't get anymore "lay person" than me! Thanks Wilson6 for making me put on my thinking cap to try to remember what I learned years ago.
EFAs are "essential" because our own bodies don't produce them and must be obtained via diet. Certain vitamins (D and E come to mind) are fat soluable and need fats in order to be effective. They aid in skin quality and elasticity. The body uses them to form compounds that help with all sorts of necessary bodily functions like synthesizing hormones (testosterone for one) clotting and oxygen dispersion. They are necessary to the formation of new cells and maintenance of cell walls.
Omega 3s (fish oils, flax, olive) produce an anabolic state in the body.
As I understand it, Omega 6 oils (nuts, seeds, safflower oil) have the same properties, are more stable than Omega 3s, BUT too much can actually have an adverse (catabolic) effect. Or am I misremembering?
BTW, can anyone tell me which category Borage and Evening Primrose oils are under? Can't remember.
I have heard that EFAs have been thought to help certain mental disorders such as autism and possibly might aid in treatment of depression and anxiety.
They're supposed to be good for female issues like PMS.
To ena987789, it's not the meal plan that reduces fat. It's all calories. Eat more than you burn and you will gain. Eat less and you will lose. Proteins and fats are necessary for muscle growth, but then, so are carbs.