Aug. 8 (Bloomberg) -- Genetics may help explain why some smokers are hooked from their first cigarette while other people seem immune to the addictive properties of tobacco, according to the second study in a month to spotlight a connection. Researchers uncovered a variation in a nicotine-receptor gene that is far more common among smokers than in those who have the occasional cigarette, according to a report in the journal Addiction. People with the genetic mutation were also eight times more likely to have had a positive first experience with smoking, such as a pleasurable buzz that encourages further use.
