These days, there are hundreds of diet plans. One of the most popular diets that has been around for decades is the low-carb eating plan. In this eating plan, carbohydrates (carbs), especially simple carbs, are restricted while foods that are higher in fat and protein are not. High-sugar items such as soda, candy, desserts, fruit juices, as well as refined grains such as pasta, cereals and breads, and starchy vegetables such as potatoes and peas, are limited.