You’ve just started out on a low-carb diet. You know the basics: stick to proteins and fats, and keep your carb intake at bay. It seems simple enough -- until your snack choices whittle down to a cheese stick and you never feel totally full. When all carbs become the enemy, an already-restrictive diet or lifestyle may feel close to impossible. Luckily, there’s a “hack” in the system (your digestive system, that is) that promotes fullness and lets you sneak in extra carbs -- without cheating on your diet at all. Meet your new low-carb best friend: fiber.