Low Carb Vegetables - nutrition per 100g. What are the best choices for a low carb (LCHF) diet? These vegetables are some of the most nutrient-dense yet lowest in carbs. Well, 19 of them anyway.... parsnips are there mainly because of how good they taste! Includes asparagus, spinach, broccoli, tomato, lettuce, mushrooms, chives, bell peppers, brussels sprouts, zucchini, onions, carrots, turnips, beets, rutabaga, artichoke, garlic, radish, kohlrabi, parsnips.