Scientists at the Pukyong University in Busan say they have isolated a peptide -- used in anti-wrinkle creams -- with antioxidant properties from bullfrog skin.

"Because it is water-soluble, the substance may be consumed in much more diverse ways than the oil-soluble tocopherol. You may put it in soft drinks, for example," Professor Kim Se-kwon of Pukyong University told AFP Tuesday.

He added that the newly found material is 10 percent more efficient than tocopherol in curbing oxidization.