There are many vegetables and fruits that contain much fiber. Common vegetables include celery, cabbage, mushrooms, kelp, etc. Common fruits include apples, pineapples, oranges, grapefruits, etc. Vegetables: such as leafy vegetables like celery (about 1.4g of fiber per 100g), cabbage, etc.; such as root potatoes (about 0.7g of fiber per 100g), sweet potatoes, etc.; such as mushrooms like enoki mushrooms (about 2.7g of fiber per 100g), monkey head mushrooms, etc.; such as seafood kelp (about 1.4g of fiber per 100g), nori, wakame, etc.; such as beans like mung bean sprouts, soybean sprouts, etc. Fruits: such as apples, pineapples, pears, lemons, oranges, etc., also contain more fiber. Fiber-rich foods are helpful for patients with certain diseases, such as constipation. However, fiber is not easy to digest, patients suffering from stomach ulcers and other diseases, should eat as little as possible.