To provide energy to the body
Major Smoking<span>-Related </span>Diseases<span>. </span>Cigarette-smoking<span> leads to an </span>increased<span> risk of</span>heart disease<span>, the leading cause of death in the United States (USDHHS, 2000); and the surgeon general's 1983 report (USDHHS, 1983) concluded that </span>cigarette-smoking<span> is the most important modifiable risk factor for </span>coronary heart disease<span>.</span>
Yes doctors can test the genetic predisposition of an individual to a disease but it is not done by genetic testing, unless they are chromosomal abnormalities or DNA sequencing abnormalities rather than just diseases with genetic predisposition such as malignancies. Heart disease, diabetes, and cancer; while does have a significant genetic predisposition, cannot be risk stratified by genetic tests because of (1) it is too costly and (2) it cannot be accurate. These genetic predisposition is best taken care of by doing proper history and physical examination as well as doing a family genogram.
If history and physical examination revealed that you are high risk to develop a disease (i.e. heart disease) then you should be advised to have lifestyle modification as well as some maintenance medications, if warranted.