Supportive text messages can double the chance of someone successfully quitting smoking, according to UK researchers. Just over 10% of 2,900 smokers who received encouraging texts such as "you can do it" had quit after six months, but only 4.9% of a similar number who did not have the same support gave up. The study, published in The Lancet, called for texts to be included in services to help people kick the habit. Other scientists said a text service could be offered globally. According to government statistics two-thirds of UK smokers say they want to stop. This study looked at 5,800 of them. Supportive texts were sent to 2,915 of the smokers for six months. The rest received only messages thanking them for taking part. They were sent five texts a day for the first five weeks and then three a week for the next 26 weeks. LAT