A vascular aging inhibitor includes a low molecular weight collagen derived from fish skin as an essential component, wherein the weight average molecular weight of the low molecular weight collagen derived from fish skin is approximately 3,000.一種血管老化抑制劑,包含衍生自魚皮之低分子量膠原蛋白作為必要成分,其中,該衍生自魚皮之低分子量膠原蛋白之重量平均分子量為約3,000。