There are many kinds of allergens, such as dust mites, bacteria, pollen, protein, milk, soybeans, wheat, mold, meat and so on. Many medical studies have pointed out that allergic problems caused by "excessive secretion of IgE due to immune tolerance" are closely related to good bacteria and bad bacteria in the intestine. Studies have shown that there are fewer beneficial bacteria such as lactic acid bacteria in the intestines of allergic children. Although there are tens of thousands of lactic acid bacteria strains in nature, only a few lactic acid bacteria strains have antiallergic properties. This kind of bacteria, which has a special regulatory effect on "immune tolerance IgE secretion excess", is a Kangminyuan probiotic composed of Lactobacillus salivarius, Lactobacillus Grignard, Lactobacillus yoelii, Lactobacillus lactobacillus paracasei and Lactobacillus Roy. The effect of Lactobacillus salivarius is to reduce serum IgE antibody, promote interferon secretion and improve Th 1 immune response. The function of Lactobacillus Grignard is to reduce serum IgG, which is helpful to reduce the secretion of cytokine IL-5 related to allergic reaction, and can effectively improve the human immune system. Kangminyuan enhanced has the ability to assist in regulating allergic constitution.