Smokers can improve the health of their hearts within weeks of switching to e-cigarettes, the largest trial of its kind shows.
The month-long study of 114 smokers suggests vaping has the potential to reduce heart attack and stroke risk.
The team, at the University of Dundee, stressed vaping was “not safe” – just less harmful than tobacco.
The British Heart Foundation said stopping smoking was the single best thing you could do for your heart.
Read more on BBC News.