The new study, published in the journal Nicotine & Tobacco Research, found that 6.2 percent of all U.S. adults and 21.2 percent of current smokers surveyed in 2011 had ever used e-cigarettes. This is an approximate doubling of 2010 estimates. It also found that six in ten adults were aware of e-cigarettes in 2011, compared to four in ten in 2010.The study points to several public health concerns about the growing use of e-cigarettes:
- "E-cigarettes have also been marketed as smoking cessation aids. However, there is currently no conclusive scientific evidence that e-cigarettes promote long-term cessation, and e-cigarettes are not included as a recommended smoking cessation method by the U.S. Public Health Service."
- "Many public health professionals are concerned that e-cigarettes may have an adverse impact on users' health, encourage smoking initiation, perpetuate the use of nicotine and tobacco products among smokers who might otherwise quit, and counter the effectiveness of smoke-free policies."