White blood cells are a type of human blood cell and play a very important role in the normal immune function of the human body. When the number of white blood cells decreases, the immune function of the human body decreases to varying degrees. People with declining white blood cells can eat more fruits rich in vitamin C and trace elements in their daily lives, which have a certain auxiliary effect on raising white blood cells, including kiwi, orange, banana, apple, cherry, etc. All of these fruits are rich in vitamin C and rich in trace elements, including iron, calcium, magnesium, etc., all of which have a supportive effect on raising white blood cells. Of course, if the white blood cell count is significantly lower, it is necessary to go to the hospital for examination and treatment, and you can take drugs that raise white blood cells, such as Ricorun, vitamin B4, shark liver alcohol, etc. However, if the white blood cell count is severely reduced, it is best to apply recombinant human granulocyte colony-stimulating factor to raise the white blood cells.