Instead, each bite delivers heart-healthy monounsaturated fats and vitamin E. They may be fruit, but avocados have almost no blood sugar-spiking sugars. For a low-carb, high-fiber pizza, top a grilled portobello mushroom with diced tomatoes, chopped basil and spinach, and mozzarella cheese. Use raw spinach in salads or on sandwiches, cook it into omelets or soups, or serve it as a side dish. Bok choy, cabbage, brussels sprouts, and broccoli are also great choices. Spinach is low-calorie, low-carb, and packed with other nutrients, including vitamins A and K, folate, and manganese. These are some high-fiber, low-carb foods that are rich in additional nutrients, too. While some high-fiber foods are high-carbohydrate, you can get plenty of fiber from lower-carb sources. It keeps you full for longer after a meal, reduces wild swings in blood sugar levels, and promotes regularity. Are you looking for help losing weight, lowering blood sugar and cholesterol, and making your diet healthier? Dietary fiber can help.