Smart Low Carb Living by Prevention Magazine.   Love to dine out? Hate small portions? Like dishes made with meat, cheese, and eggs? Hate feeling hungry? Want to lose 10, 20, 30 or more pounds?    Want to get your blood sugar under control? If you answered yes to any or all of these questions, then smart low-carb living is for you. Here's a sampling of what you'll find inside. Breakthrough information on why extra carbs make you gain and retain weight. Simple tricks to help you make the switch to low-carb eating, a guide to glycemic index, what it is, how to make it work for you.