Generally, healthy people do not need to enhance the function of leukocytes through dietary supplements, but for certain patients with reduced leukocyte count, they can enhance the function of leukocytes by increasing the number of leukocytes in peripheral blood through dietary supplements. First of all, patients with reduced leukocytes should eat more high-quality proteins because high-quality proteins are the material basis for synthesizing leukocytes, including fresh milk, eggs, fish and high-quality meat, such as beef, mutton and chicken, etc. All high-quality proteins are essential raw materials for synthesizing leukocytes and can increase the function of leukocytes. Secondly, it is also important to eat more fresh green leaves and vegetables, including fresh leeks, spinach, celery and so on. The food is rich in folic acid, which can also promote the synthesis of white blood cells, for patients with leukopenia, you can properly eat more of the above-mentioned foods.