The intake of either NPJ or HPJ led to a decrease in urinary @-hydroxy-@ ' - deoxyguanosine ( NPJ : @ @ to @ @ ng/mg creatinine ; HPJ : @ @ to @ @ ng/mg creatinine ) , @-iso-prostaglandin F@ ( NPJ : @ @ to @ @ ng/mg creatinine ; HPJ : @ @ to @ @ ng/mg creatinine ) , erythrocyte catalase , and glutathione reductase activities .