PROBLEM TO BE SOLVED: To utilize a natural material which induces or promotes the production of a G-CSF (granulocyte-colony stimulating factor) in the body instead of a recombinant G-CSF which is obtained by a genetic engineering procedure and is high in cost, and to provide a product and a method which adjust the immune function of human or animals other than human.SOLUTION: A product for inducing or promoting the production of a G-CSF comprises gamma-aminobutyric acid and inositol hexaphosphate (or inositol hexaphosphate and other inositol) extracted from a fermentation liquid of rice germ as main ingredients.
