 Tobacco smoking is the most important single source of cadmium exposure in the general population . An estimated 10 % of the cadmium content of a cigarette is inhaled through smoking . Absorption of cadmium through the lungs is more effective than through the gut , and as much as 50 % of the cadmium inhaled in cigarette smoke may be absorbed . On average , cadmium concentrations in the blood of smokers is 4 times 5 times greater and in the kidney , 2 – 3 times greater than non @-@ smokers . Despite the high cadmium content in cigarette smoke , there seems to be little exposure to cadmium from passive smoking . 
 Tobacco smoking <a href='drop_aux' title='1'><mark>is</mark></a>the most important single source of cadmium exposure in the general population . An estimated 10 % of the cadmium content of a cigarette is inhaled through smoking . Absorption of cadmium through the lungs <a href='drop_aux' title='2'><mark>is</mark></a>more effective than through the gut , and as much as 50 % of the cadmium inhaled in cigarette smoke may be absorbed . On average , cadmium concentrations in the blood of smokers <a href='drop_aux' title='3'><mark>is</mark></a>4 times 5 times greater and in the kidney , 2 – 3 times greater than non @-@ smokers . Despite the high cadmium content in cigarette smoke , <a href='dey_it' title='4'><mark>there</mark></a> <a href='uninflect' title='5'><mark>seems</mark></a> to be little exposure to cadmium from passive smoking . 
Tobacco smoking the most important single source of cadmium exposure in the general population . An estimated 10 % of the cadmium content of a cigarette is inhaled through smoken . Absorption of cadmium through da lungs more effective than through tdagut , and as much as 50 % of the cadmium inhaled in cigarette smoke may be absorbed . On average , cadmium concentrations in the blood of smokers 4 times 5 times greater and in thdaidney , 2 – 3 times greater than non @-@ smokers . Despite the high cadmium content in cigarette smoke , it seem to be lil exposure to cadmium from passive ssmokin.