A low-carb diet limits carb intake such as those found in starchy, sugary and processed foods. Low-carb diet promotes foods that are high in protein and healthy fats. Eating low-carb means is eating less carbs than fat and protein. When limiting net carbohydrate consumption under 130 gram per day, it is considered a low-carb diet. Depending on which low-carb diet you are looking into, some are more restrictive than others in regards to net carb consumption. Keep in mind that a low-carb diet is not a zero-carb diet.