PROBLEM TO BE SOLVED: To find a highly safe natural product having an adipocyte differentiation inhibitory action, an adipocyte differentiation inhibitor containing the same as an active ingredient, and an oral composition for adipocyte differentiation inhibitor containing the component. Provide things. In addition, we found a highly safe natural product that has a lipid droplet hypertrophy inhibitory effect, and a lipid droplet hypertrophy inhibitor containing it as an active ingredient, and an oral lipid droplet hypertrophy inhibitor containing the ingredient. The composition is provided. A black ginger extract is used as an active ingredient of an adipocyte differentiation inhibitor and a lipid droplet hypertrophy inhibitor according to the present invention. In addition, the black ginger extract is added to the oral composition for suppressing adipocyte differentiation and the oral composition for suppressing lipid droplet hypertrophy according to the present invention. [Selection diagram] Fig. 1
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