To provide whitening compositions in which the tyrosinase activity inhibitory action of a tyrosinase activity inhibitor is enhanced using a placenta extract obtained through one or more treatments of enzyme treatment, heat treatment, or hydrolysis treatment.SOLUTION: A whitening composition is obtained using a tyrosinase activity inhibitor, for example such as a culture obtained by culturing a fruit core of pineapple with lactic acid bacteria, a placenta extract obtained through one or more treatment of enzyme treatment, heat treatment, or hydrolysis treatment, and other necessary formulation base component and the like.SELECTED DRAWING: Figure 5【課題】 酵素処理、加熱処理又は加水分解処理のうち１又は２以上の処理を経て得られたプラセンタ抽出物を用いて、チロシナーゼ活性阻害剤のチロシナーゼ活性阻害作用が高められた美白用組成物を提供する。【解決手段】 例えば、パイナップルの果芯部を乳酸菌で培養して得られる培養物のようなチロシナーゼ活性阻害剤と、酵素処理、加熱処理又は加水分解処理のうち１又は２以上の処理を経て得られたプラセンタ抽出物及びその他必要な製剤用基材成分等を用いて、美白用組成物とする。【選択図】図５
