If you have tried and tried again to give up smoking but just cannot seem to butt out for good, a new study suggests your genes might be to blame.
Researchers at the University of Colorado looked at the smoking habits of nearly 600 pairs of twins over a 20-year period.
They found that identical twins, who share the same genes, where more likely to quit smoking around the same time, compared to fraternal twins, who do not share as many genetic similarities.
The study’s lead author believes this suggests that there is a genetic component to nicotine addiction.
However, scientists are still working to pinpoint the gene or genes involved.