I was intrigued by this question ever since I read Angela's ashes by Frank McCourt. Seems like his father survived on porter alone (although obviously this is

I was intrigued by this question ever since I read Angela's ashes by Frank McCourt. Seems like his father survived on porter alone (although obviously this is told though a child's eyes). Beer seems to contain around 1% protein which isn't much. Carbs should be plenty though.