The present comparative and prospective study includes 400 normal subjects, out of which 200 were Indian and 200 were Hungarians. The latter population distinctly differed from Indian population in four respects. First is race wise, second living in relatively unpolluted environment, third liberal use of alcohol and fourth moderate to heavy smokers. The thiobarbituric acid reactive substances (TBARS) levels in Hungarians were 300% higher (males, 8.60 __ampersandsignplusmn; 2.70 nmol/ml, females, 7.10 __ampersandsignplusmn; 0.62 nmol/ml) than Indians (males, 2.55 __ampersandsignplusmn; 0.71 nmol/ml, females, 2.25 __ampersandsignplusmn; 0.56 nmol/ml).