New paper by Hajek group presents misleading incomplete results about dual use when using e-cigs as cessation aid

One concern about giving smokers e-cigarettes as a smoking cessation aid is that doing so instantly converts them into dual users (smoking both cigarettes and e-cigarettes), which adds the risks of e-cigarette use to cigarette use.  Peter Hajek’s group just published Patterns of e-Cigarette Use and Smoking Cessation Outcomes: Secondary Analysis of a Large RandomisedContinue reading “New paper by Hajek group presents misleading incomplete results about dual use when using e-cigs as cessation aid”

Plain language summary of meta-analysis of ecigs and disease available

Last year we published “Population-Based Disease Odds for E-Cigarettes and Dual Use versus Cigarettes” that showed that some disease risks of e-cigarettes are indistinguishable from cigarettes and for others they on only slightly lower. This paper continues to attract interest, so I prepared a one page plain language summary, together with some frequently asked questions.Continue reading “Plain language summary of meta-analysis of ecigs and disease available”

E-cigarettes increase harm to smokers, so should not be promoted as a harm reduction strategy (in 10 slides) now available in 10 other languages

My blog post “E-cigarettes increase harm to smokers, so should not be promoted as a harm reduction strategy (in 10 slides)” has attracted a lot of interest, so I have translated it into 10 other languages. Click below to download. These translations were done with Powerpoint. If native speakers have suggestions for improvement, feel free toContinue reading “E-cigarettes increase harm to smokers, so should not be promoted as a harm reduction strategy (in 10 slides) now available in 10 other languages”

People who smoke both tobacco and cannabis are even more sensitive to paying more for cigarettes than those who just smoke cigarettes

Raising the cost of a pack of cigarettes, whether because of taxes or price hikes, has long been associated with lower consumption. The new paper Differential Responsiveness to Cigarette Prices by U.S. Adults Who Do and Do Not Use Cannabis by Tingting Yao and her UCSF colleagues shows that cigarette smokers who currently use cannabisContinue reading “People who smoke both tobacco and cannabis are even more sensitive to paying more for cigarettes than those who just smoke cigarettes”

New Pesko et al paper supporting e-cigs ignores current science

Several people have asked me what I thought of the just-published paper E-Cigarettes in Historical Context—Innovation, Risk, and Regulation by Michael Pesko, Jamie Hartmann-Boyce, Rachel Fung and Neal Benowitz. Like other similar papers published by some of these people, the Pesko paper relies on the 7 year old 2018 National Academies of Science, Engineering andContinue reading “New Pesko et al paper supporting e-cigs ignores current science”

International Pediatric Association publishes position paper concluding that “e-cigarettes are not an effective harm reduction strategy for adults and pose a serious risk to nicotine naïve youth”

On October 10, 2025, the International Pediatric Association (IPA) published a landmark position paper, “E-Cigarettes and the Nicotine Epidemic: Statement From the International Pediatric Association,” in Pediatrics, the international peer-reviewed journal published by the American Academy of Pediatrics. The paper concluded, “In contrast to early hopes and assumptions, e-cigarettes are not an effective harm reductionContinue reading “International Pediatric Association publishes position paper concluding that “e-cigarettes are not an effective harm reduction strategy for adults and pose a serious risk to nicotine naïve youth””

FDA setting a maximum level of nicotine in tobacco products without exceptions for HTP and waterpipe will improve health

My colleagues at UCSF and Stanford and I have submitted this public comment to the FDA supporting a product standard limiting nicotine in tobacco products and opposing exceptions for heated tobacco products and waterpipe (PDF). The Comment Tracking Number in regulations.gov is mfj-vc5x-sbgb .FDA’s proposed tobacco product standard setting a maximum level of nicotine inContinue reading “FDA setting a maximum level of nicotine in tobacco products without exceptions for HTP and waterpipe will improve health”

Inhaled cannabis associated with increased risk of asthma and COPD independent of tobacco smoking

Answering the question of whether inhaling cannabis increases the risks of asthma and chronic obstructive pulmonary disease (COPD) has been complicated by the fact that in the past almost all cannabis smokers also smoked tobacco, so it was difficult to determine whether the observed associations between smoking cannabis and these diseases was really due toContinue reading “Inhaled cannabis associated with increased risk of asthma and COPD independent of tobacco smoking”

In UK 7 times more 16-17 year olds smoking than if there had been no e-cigs

Jessica Mongilio and colleagues just published an innovative approach to assessing the association between e-cigarette use and smoking, the so-called gateway effect, that provides insights between the link between e-cigs and smoking and how it relates to changes in youth smoking prevalence over time. In their new paper “Risk of adolescent cigarette use in threeContinue reading “In UK 7 times more 16-17 year olds smoking than if there had been no e-cigs”

The evidence for the ecig gateway to smoking keeps piling up; ecig advocates continue to nitpick

Su Golder and colleagues paper “Vaping and harm in young people: umbrella review” sums up the large existing literature on e-cigarettes’ effects on youth, defined as people under 25. In contrast to systematic reviews which find and draw conclusions based on summing up individual studies, this umbrella review is finds and sums up all theContinue reading “The evidence for the ecig gateway to smoking keeps piling up; ecig advocates continue to nitpick”