Good carbs, bad carbs

  Is it really carbs that are making us pack on pounds? Are the popular high-protein, low-starch diets a scam, or do they actually work? Here's what you need to know about carbs and some of the diets that bash 'em:

• What is a carb • The fat factor • What you can learn from low-carb diets • What's wrong with the low-carb approach • Not all carbs are created equal • Carb-bashing diets • The bottom line