What are the evidence‑based health risks of vaping (electronic cigarette use)?

Evidence-Based Health Risks of Vaping

Vaping poses significant cardiovascular and respiratory health risks and should be actively discouraged in all patients, particularly youth, as it is not a harmless alternative to traditional cigarettes and contributes to nicotine dependence. 1

Cardiovascular Risks

E-cigarettes cause documented harm to the cardiovascular system despite being marketed as safer alternatives to combustible cigarettes. 1, 2

• Vaping adversely affects cholesterol metabolism and cardiovascular health 2
• Studies demonstrate sympathetic activation, vascular stiffening, and endothelial dysfunction—all associated with adverse cardiovascular events 3
• Nicotine from vaping plays a major role in the development of coronary artery disease, atherosclerosis, and aortic aneurysms 2
• The relative risk of myocardial infarction in young users may be significantly elevated, similar to patterns seen with combustible cigarettes 4

Respiratory System Damage

Vaping causes measurable pulmonary harm even when standard spirometry appears normal. 3

• Increased biomarkers of pulmonary disease are consistently found in e-cigarette users 3
• E-cigarette use is associated with increased incidence of respiratory diseases even in people who have never smoked 3
• Lung disease (EVALI) has occurred in adolescents, and not all cases are linked to vitamin E acetate 5
• Population-based research shows a consistent link between current vaping and respiratory issues during adolescence 5

Nicotine Addiction and Gateway Effects

E-cigarettes are highly addictive and serve as a gateway to combustible cigarette use, particularly in youth. 1, 5

• The Population Assessment of Tobacco and Health (PATH) Study confirms e-cigarettes contribute to nicotine dependence, with no safe tobacco product existing 1
• High-nicotine delivery systems have transformed the e-cigarette landscape and increased addiction potential for young people 4
• Longitudinal research demonstrates a robust relationship between youth vaping and subsequent use of combustible cigarettes as adults, even among youth at low risk for smoking 5
• E-cigarette use is associated with increased odds of smoking combustible cigarettes among adolescents who had no previous intention of smoking 4

Toxic Substance Exposure

E-cigarettes contain and emit numerous toxic substances beyond nicotine. 4, 5

• Devices create multiple toxic substances on inhalation, including metallic nanoparticles, particulate matter, and carbonyls 5
• Exposure is highly variable based on product characteristics and usage patterns 4
• Adverse health effects for third parties exposed to e-cigarette emissions cannot be excluded 1

Special Population Concerns

Youth and Adolescents

E-cigarette use among youth poses a clear public health threat with dramatic increases in usage. 4, 6

• Over 30% of high school-age adolescents report e-cigarette use 3
• The physiological and psychological harms of nicotine dependence during adolescence are well documented 5
• Effects on cardiopulmonary endpoints in adolescents remain largely unstudied despite widespread use 3

Patients with Diabetes

Individuals with diabetes should specifically avoid vaping due to compounded cardiovascular risks. 1

• The American Diabetes Association recommends avoiding e-cigarettes either as a smoking cessation method or recreationally 1
• Electronic cigarette use should be specifically discouraged in youth with diabetes due to increased cardiovascular disease risk 2

Dual Use Amplifies Risk

Using both e-cigarettes and combustible cigarettes simultaneously amplifies health risks rather than reducing them. 7

• Dual consumption appears to further amplify risks of cancer and other smoking-related diseases 7
• Patients using e-cigarettes to quit smoking should be advised to avoid using both products simultaneously and develop a plan to quit e-cigarettes as well 1, 2

Inadequate Evidence for Smoking Cessation

E-cigarettes lack strong evidence as effective smoking cessation tools. 4, 8

• Evidence is limited regarding the efficacy of e-cigarettes as a smoking cessation aid 4
• A 2020 Cochrane review found only moderate evidence that quit rates were higher with nicotine e-cigarettes compared to nicotine replacement therapy 4
• Meta-analyses of observational studies demonstrate that e-cigarette use is not associated with smoking cessation 3
• Most governing bodies have not approved e-cigarettes as a smoking cessation tool 8

Clinical Recommendations

Healthcare providers should implement the following approach:

• Screen for tobacco, nicotine, and electronic cigarette use at every routine healthcare visit 2, 6
• Advise all patients to avoid both smoking and vaping for optimal health outcomes 4, 6
• Recommend varenicline as first-line pharmacotherapy combined with counseling for smoking cessation rather than e-cigarettes 1
• For patients using e-cigarettes to quit smoking, counsel them to avoid dual use and develop a concrete plan to eventually quit e-cigarettes 1, 2

Common Pitfalls

The most dangerous misconception is that e-cigarettes are harmless or significantly safer than traditional cigarettes. 2, 6

• Marketing and popular press have created false perceptions of safety 1
• While combustible tobacco products are clearly the most harmful, electronic products should not be characterized as harmless 1
• The health risks of e-cigarettes have not been adequately studied, and long-term effects remain unknown 1, 7
• The addictive power of nicotine and its adverse effects should not be underestimated 1