Actually, you could survive solely on a diet of potatoes and milk, with all the essential nutrients provided - http://www.straightdope.com/columns/read/2828/cou

Actually, you could survive solely on a diet of potatoes and milk, with all the essential nutrients provided - http://www.straightdope.com/columns/read/2828/could-i-survive-on-nothing-but-potatoes-and-milk http://www.straightdope.com/columns/read/2828/could-i-surviv... (This includes more potato famine info as well). I doubt fries and a shake would work as well. Then again, maybe it's just evolving 'essential nutrients' to 'essential nutrients with optional cholesterol'.