Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Medical science have recently revealed that people with a slow nicotine metabolism have a greater brain response to smoking signals than those with a slow nicotine metabolism. Therefore, the weight factor does urge the individuals with a faster biology to crave for nicotine. How can this be possible? According to the researchers at the Montreal Neurological Institute and Hospital , the people who possess a body which delivered nicotine to their systems swiftly, have proved to emit a greater response to cravings...