Reducing harm and improving health?
Vapes have also been touted as a boon to individual and public health since cigarette smoking is the leading cause of preventable disease and disability in the United States, responsible for more than 480,000 deaths per year in the U.S., according to the U.S. Centers for Disease Control and Prevention.
Quitting smoking lowers the risk of developing various cancers, heart disease, stroke, and other serious diseases. The aim of nicotine replacement therapy is to help smokers quit by gradually providing the body with smaller doses of nicotine over time, without exposing the body to toxic chemicals found in cigarettes.
“No one should say that e-cigarettes are safe, but compared to cigarettes, the data is consistent: They are not as harmful, and when a smoker switches, it’s better for them,” Dr. Shields said. “Like with other nicotine replacement therapies, if there is a risk that someone stops vaping and returns to smoking, I would rather have them as long-term vapers since it is generally considered to be less harmful than combustible tobacco.”
The FDA has allowed a handful of companies to market their electronic nicotine delivery systems as safer than traditional cigarettes by gaining approval through the Premarket Tobacco Product Applications process. In 2021, the agency announced its first PMTA authorization of an electronic cigarette to R.J. Reynolds for three of its tobacco-flavored vaping products. Regulators approved more products from three additional companies in 2022.
But the FDA has also denied others, including two products in 2023 from R.J. Reynolds, stating that, “the applications lacked sufficient evidence to demonstrate that permitting the marketing of the products would be appropriate for the protection of the public health.”
Questions remain among some researchers on the effects of vaping if used long term. Data on the health effects of vapes are just beginning to emerge and are mainly from studies of animals or cells. Measuring health effects among vape users will entail decades more of study, since Americans only gained access to the products in the 2000s.
Dr. Eissenberg said vaping likely does not cause the same diseases as cigarette smoking, but that does not mean they are not harmful. Ingredients found in e-cigarettes, such as heated propylene glycol, vegetable glycerin, and flavors, have only been used as food ingredients. The potential diseases caused by vapes are still unknown, because inhaling these heated ingredients is new. He also said he had “no issue” with an adult smoker vaping to help them quit smoking – as long they do so for a short period.
“I am very concerned that long-term use in adults could lead to considerable disease and death,” Dr. Eissenberg said. “Simply put, the human lung evolved for one purpose: gas exchange of oxygen in, carbon dioxide out. Anything else that enters the lung is a challenge to the organ.”
But Kenneth Warner, PhD, dean emeritus at the University of Michigan School of Public Health, Ann Arbor, said breaking the addiction to traditional cigarettes could reduce high rates of lung cancer in lower income communities where rates of smoking are comparatively high.
About three times as many Americans smoked (12.6%) than vaped (4.7%) in 2021, but those who live in households with lower incomes are more likely to smoke. According to the CDC, use of tobacco is higher among adults who were uninsured (27.3%) or who had Medicaid coverage (28.6%) than among those with private insurance (16.4%). People with annual family incomes of less than $12,500 also are more likely to be diagnosed with lung cancer than those with family incomes of $50,000 or more. Public health researchers have attributed those disparities in part to higher rates of smoking in lower-income households.
Dr. Warner said many lower-income and other Americans may never quit smoking cigarettes because they believe making the switch to e-cigarettes will not benefit their health. A 2022 study, published in the American Journal of Preventive Medicine, found that the percent of Americans who thought vaping was more harmful than smoking quadrupled between 2018 and 2020, from 6.8% to 28.3%. A third of respondents thought vaping was as harmful as smoking.
“We’ve convinced a large percentage of the American public that vaping is as harmful as smoking when it could be helping people quit smoking,” Dr. Warner said. “People are dying right now.”
Ms. Markowitz did quit smoking by taking up vaping. But now she questions if her lung cancer prognosis would have been delayed, or even avoided, if she’d tried a traditional method like a lozenge or gum instead. She vaped once an hour for most of her 7 years of using the devices.
“For people who are trying to stop smoking, I would recommend something like the patch instead,” Ms. Markowitz said.
The Consumer Advocates for Smoke-free Alternatives receives funding from the vaping industry. Dr. Blaha, Dr. Eissenberg, Ms. Hanna, Dr. Shields, and Dr. Warner reported no funding from the tobacco or e-cigarette industry. Dr. Blaha and Dr. Warner receive tobacco-related research funding from the FDA. Dr. Warner is a member of the FDA’s Tobacco Products Scientific Advisory Committee.
A version of this article first appeared on Medscape.com.