There are many foods that do not contain carbohydrates. The main sources of carbohydrates are: sugar, grains (such as rice, wheat, corn, barley, oats, sorghum and so on. ), fruits (such as sugar cane, melon, watermelon, banana, grape, etc. ), dried fruits, dried beans, root vegetables (such as carrots and sweet potatoes). Besides, it is basically a carbohydrate-free food.