<;P>;PROBLEM TO BE SOLVED: To provide an increase promoter and/or a reduction inhibitor of adiponectin level in blood and a food and drink and a feed for promoting an increase and/or inhibiting a reduction in the adiponectin level in blood. <;P>;SOLUTION: The increase promoter and/or reduction inhibitor of the adiponectin level in blood comprise a cultured product of a lactic acid bacterium of the genus Lactobacillus, above all, Lactobacillus gasseri and Lactobacillus helveticus or a bacterial cell itself thereof as an active ingredient. The food and drink and feed for promoting the increase and/or inhibiting the reduction in the adiponectin level in blood comprise the cultured product of the lactic acid bacterium of the genus Lactobacillus and/or bacterial cell thereof as the active ingredient. <;P>;COPYRIGHT: (C)2008,JPO&INPIT