Smoking changes brain the same way as drugs
A recent study found out that smoking causes long-lasting changes in the brain similar to changes seen in animals when they are given cocaine, heroin and other addictive drugs. These changes are linked to two enzymes found on brain cells or neurons. These enzymes help the neurons use chemical signals such as those made by the message-carrying compound dopamine, and they are found in greater quantity in smokers and former smokers.
“The data show that there are long-lasting chemical changes in the brains of humans,” said Michael Kuhar of Emory University in Atlanta, who was not involved in the study.
“The chemical changes alone suggest a physiological basis for nicotine addiction.” Yahoo! Health News