There are many foods to supplement iron, including animal liver, including pig liver, duck liver, sheep liver, chicken liver and so on. , and pig blood, sheep blood, beef and mutton, egg yolk. In addition, some vegetables are rich in iron, such as kelp, laver, black fungus, soybean, mushroom, celery, jujube and so on. You should also eat more fruits and vegetables rich in vitamin C, such as oranges, kiwis and tomatoes.