From John Davies
As a doctor, I have spent time helping people to stop smoking, so I am delighted that Mike Taylor has been able to cut down with the aid of an e-cigarette (Letters, 8 August). But I disagree with his point that it is self-righteousness or puritanism that prevents medicine embracing the e-cig.
First, governments refuse to regulate the content of e-cigs, so we have no idea what they contain and in what quantities. Second, it takes a long time to carry out proper investigations into the health effects. Without that evidence, a doctor cannot advise their patient to use one – or not to.
Lancaster, UK
