Abstract: Multiplication of lymphocyte, phagocytosis of Macrophage and killing ability of NK cell of Mice spleen were used as index to study the immunoregulation activity of immune-enhanced enteral nutritional preparations in this paper. The results shown that the immune-enhanced preparations could remain the normal physiochemical function of mice, stimulate the immune functions of normal rats in certain extent, especially the low concentration immune enhanced formula. It can improve the proliferation of lymphocyte and the killing ability of NK cell of mice spleen evidently, and has an equal impact to the import immune enhanced preparation.

Key words: enteral nutritional preparation, immune, immunoregulation, lymphocyte multiplication, natural killercell