There is no such thing as dietary supplements to raise white blood cells, but you can eat vegetables and fruits and other foods rich in vitamin C to promote white blood cell production. Low white blood cells are usually caused by infection, hematologic diseases, hypersplenism and so on. 1. Infections: some patients will have leukopenia after viral infections, and the leukocytes will return to normal after active antiviral treatment. 2. Blood system diseases: such as myelodysplastic syndromes and acute leukemia, which can also lead to leukopenia, generally can be taken orally to enhance white blood cells, or recombinant human granulocyte stimulating factor to enhance the white blood cells of temporary treatment, need to actively treat the primary disease. 3. Hypersplenism: low white blood cells caused by hypersplenism can be given Diyu Baixin tablets to raise white blood cells, white blood cells continue to be low, can be given to the splenectomy, generally can be restored to normal. If the patient has low white blood cells for a long time, it is recommended that the patient go to the hospital in a timely manner to improve the relevant examinations and clarify the cause of the disease, so as to avoid delaying the condition, especially for the elderly and pregnant women.