What is the "best" diet? Do calories matter? And when it comes to protein, fat, and carbs, which ones are good and which are bad? With common sense and a dash of wit, Mark Bittman and David Katz answer all these questions and more in a lively and easy-to-read Q&A format. Topics include dietary patterns (just what should humans eat?); grains (aren't these just carbs? Do I need to avoid gluten?); meat and dairy (does grass-fed matter?); and alcohol (is drinking wine actually good for me?)