Cigarettes containing a very low level of nicotine can help people quit smoking, if they are cheap enough, a trial has found.
The study found that smokers given a free supply of the research cigarettes halved their smoking of normal cigarettes, their levels of addiction reduced and they were more likely to quit smoking.
This randomly selected "intervention group" were compared with smokers who were asked to continue buying and smoking their usual cigarettes.
In the small trial run in Queenstown, the intervention group was given a 12-week supply of the very-low-nicotine cigarettes last December.
The trial, conducted by Auckland University's National Institute for Health Innovation, is part of a wider tobacco research programme aimed at helping to reduce New Zealand's smokers to less than 5 per cent of the population by 2025.