['Iceberg lettuce. Perhaps one of the most popular — though least nutritious — vegetables, iceberg lettuce has only 2.97 g of carbohydrate per 100 g. ... ', 'White mushrooms. Mushrooms contain only 3.26 g of carbs per 100 g. ... ', 'Spinach. ... ', 'Broccoli. ... ', 'Zucchini. ... ', 'Cauliflower. ... ', 'Asparagus. ... ', 'Radishes.']