The invention provides a nano composite material including hydrolyzed collagen and tannin. Tannin aqueous solution is added in the aqueous solution of the hydrolyzed collagen so that the hydrolyzed collagen and tannin are self-assembled to form the nano composite material. The molecular weight of the hydrolyzed collagen is within the range from 800 to 2000. The molecular weight of tannin is within the range from 500 to 3000. The nano composite material has an average particle diameter range from 100 to 500 nm and is capable of penetrating the skin to enter human body while having antioxidation and heavy metal cleaning functions. The nano composite material can also be used as a drug carrier.本發明提供一種奈米複合物,包含水解膠原蛋白及單寧,係將單寧水溶液加入水解膠原蛋白水溶液中,使水解膠原蛋白與單寧藉由自組裝方式形成該奈米複合物;其中,該水解膠原蛋白之分子量範圍為800~2000,該單寧之分子量範圍為500~3000。該奈米複合物具有100~500 nm之平均粒徑範圍,可以穿透皮膚進入人體,並具有抗氧化和清除重金屬之功效,亦可以作為藥物之載體。
