A composition containing CitrusC, a tyrosinase inhibitor, for providing whitening effect is primarily composed of: 0.1-2.5wt% CitrusC, 0.1-2.5 wt% Ascorbic Acid 2-Glucoside, 0.1-2.5wt% Tranexamic Acid and a moist essence as a carrier. The ingredients of the composition work in synergism to provide skin applied with the composition with the whitening effect.本發明含酪胺酸酶抑制劑之美白精華液組合物,主要由下列成分組成:0.1-2.5%重量百分比之酪胺酸酶抑制劑(CitrusC)、0.1-2.5%重量百分比之維他命C醣甘、0.1-2.5%重量百分比之傳明酸以及一保濕精華液基底;該組合物之成份協同地互相作用以增進皮膚美白。