What is carbohydrate, a staple food without carbohydrate?

What are carbohydrates, which foods contain no carbohydrates and which foods contain no carbohydrates? Let me summarize it for your reference only.

What are carbohydrates? Carbohydrate consists of three elements: carbon, hydrogen and oxygen. Because the ratio of hydrogen to oxygen is two to one, which is the same as water, it is called carbohydrate. It is the cheapest of the three main nutrients that provide heat energy for human body. Carbohydrates in food can be divided into two categories: effective carbohydrates that people can absorb and utilize, such as monosaccharides, disaccharides, polysaccharides and ineffective carbohydrates that people can't digest, such as cellulose, which are essential substances for human body.

What is a staple food that contains no carbohydrate, but almost no carbohydrate? It is meat, eggs, fish and leafy vegetables. The food with almost no carbohydrate is 1. Avocado; 2. Bamboo shoots; 3. beer; 4. cauliflower; 5. broccoli; 6. Skim milk. Papaya; 8. chicory root; 9. oranges; 10. chicory; 1 1. strawberry; 12. vinegar 13. Pickled pickles; 14. Jam (without sugar); 15. grapefruit; 16. Cucumber; 17. Yeast; 18. ruble 19. Hami melon; 20. Ginger; 2 1. Yogurt; 22. Yogurt (full fat); 23. Yogurt 0.3%; 24. Yogurt 1.5%25. Red gooseberry; 26. Blackcurrant; 27. carob powder; 28. carrots; 29. carrot juice; 30. Cherry 3 1. Kiwifruit; 32. Chinese cabbage; 33. turnip cabbage; 34. Coconut milk; 35. Coconut; 36. crustaceans 37. Pumpkin; 38. Onions; 39. Flaxseed/Sesame/; 40. Almond milk; 4 1. almond; 42. Trent cuisine 43. Melon, honeydew melon; 44. Milk (full fat or skim); 45. Onions; 46. Nuts; 47. olives; 48. oranges 49. Palm heart; 50. papaya

Foods with more carbohydrates have higher carbohydrate content. Sugar is an important organic compound, which is widely distributed in nature, such as sugar and sucrose. Grain is also an important food source of carbohydrate intake, and there are many kinds of grains, such as rice, millet and wheat. Grain is also the traditional staple food of China people. The carbohydrate content per100g of rice can be as high as 75g. Sorghum and corn also contain carbohydrates; Sorghum can contain about 70 grams of carbohydrates per 100 gram after hulling. Sugarcane and banana are also rich in carbohydrates. The carbohydrate content per100g of sugarcane is16g, and that per100g of banana is19g.