To provide an adiponectin secretion regulator whereby the effect of adiponectin can be efficiently expressed while the adverse effect of appetite increase associated with adiponectin is avoided, and to provide a food/drink product, a functional food product, a cosmetic, a pharmaceutical, and an animal feed having such adiponectin secretion regulating effects. In the present invention, fucose or a precursor thereof is used as an active ingredient of the adiponectin secretion regulator. A food/drink product, a functional food product, a cosmetic, a pharmaceutical, or an animal feed having adiponectin secretion regulating effects is obtained by compounding a specific amount of fucose or a precursor thereof.
