Smokers have lower IQs than non-smokers, and the more one smokes the lower one’s IQ, research has found. A study of 18-21 year old men in the Feb 2010 issue of Addiction showed that smokers’ IQs averaged 94, seven points lower than the 101 average of non-smokers. Those who smoked more than a pack of cigarettes a day averaged just 90 between them. The study took data from more than 20,000 men before, during and after their compulsory service in the Israeli
