... Polysaccharide, nucleotide acid and active enzyme which are rich Yeast Extract can stimulate animal immune organs to growth, activate lymphocytes, ... promote animals to absorb fat-soluble Vitamins A, D, E, and K. For more importance is that they can ... antioxidation and integraded detoxification, which can combine with some toxins, e.g. free radical and heavy metal, involved in biotransformation, ...