Vaping and Your Blood Vessels: What the Research Actually Shows

A stylized branching blood vessel highlights the vascular side of the vaping conversation. Original conceptual illustration; not an anatomical diagram.

A vape can look small, familiar, and easy to carry. The questions about what it does inside the body are much bigger. If you smoke, vape, or are considering switching between the two, it helps to understand more than the ingredients on a label.

Your blood vessels carry blood throughout your body. Research suggests that vaping can affect how those vessels work. That does not mean every laboratory finding predicts a future heart attack or blood clot. It does mean that "less smoke" should not be confused with "no risk." [1,2]

The inner lining of a blood vessel, called the endothelium, helps the vessel respond to changing demands for blood flow. A vessel needs to widen and narrow appropriately. Researchers study these responses because they offer clues about vascular health. They are measuring how a system works, not simply whether someone feels well. [2]

In a 2022 study, researchers compared people who regularly used e-cigarettes, people who smoked cigarettes, and people who used neither. Both vaping and smoking groups showed poorer blood vessel dilation than the nonuser group. Additional laboratory experiments explored how substances in participants' blood affected vessel-lining cells. These findings raise concerns about vascular function, but they do not establish the long-term chance of a heart attack or stroke for an individual who vapes. [2]

A separate randomized crossover trial published in 2023 involved 22 healthy adults with occasional tobacco use. Each participant tried e-cigarette aerosol with nicotine and without nicotine on separate occasions. After nicotine-containing aerosol exposure, blood samples showed increased clot formation in laboratory flow tests at 15 minutes; those measures returned toward baseline by 60 minutes. Researchers also found a reduced capacity for small blood vessels to dilate on one test. [3]

This was a small, short-term experiment. It did not show that participants developed a deep vein thrombosis, pulmonary embolism, heart attack, or stroke. A laboratory measure of clot formation is not the same thing as a diagnosed clot in a person. Products, patterns of use, and individual health also vary. The study adds evidence about immediate effects; it cannot tell us every long-term outcome. [3]

Most e-cigarettes contain nicotine, which can create dependence. Aerosol can also contain metals, very small particles, and other potentially harmful substances. Ingredients that may be acceptable to eat are not automatically safe to inhale. Researchers are still studying how these exposures affect health over time. A nicotine-free label should not be read as a guarantee that an inhaled product is harmless. [1]

The harms of cigarette smoking are well established. Smoking damages blood vessels and contributes to coronary heart disease and stroke. Quitting smoking benefits cardiovascular health, including for people who already have heart disease. [4]

CDC notes that e-cigarettes may benefit adults who smoke and are not pregnant when used as a complete substitute for smoked tobacco. That is a specific situation, not an invitation for someone who does not smoke to start vaping. No e-cigarette is FDA-approved as a smoking-cessation aid. Talk with a clinician about a plan that addresses both cigarette use and vaping rather than assuming one product cancels out the other. [1,5]

You do not need a perfect quitting plan before asking for help. Start with what you use, how often you use it, and what makes it hardest to stop. For smoking cessation, counseling and medication together offer the best chance of quitting successfully. Options include nicotine replacement medicines and prescription treatments; a clinician can help you choose an approach that fits your health and circumstances. If you vape, ask specifically about support for stopping vaping. [5]

Questions you can bring to your next appointment:

• How does smoking or vaping fit with my blood pressure, heart health, or history of blood clots?

• Which quitting options make sense for me, and how will we manage cravings?

• If I use both cigarettes and a vape, what is our plan for stopping cigarettes completely?

• What support can I use if my first attempt does not stick?

In the United States, 1-800-QUIT-NOW connects people to free smoking-cessation coaching. You can also explore Smokefree.gov. Asking for help is a practical next step, whether you are ready to quit today or still working through your options. [5]

1. Centers for Disease Control and Prevention. Health Effects of Vaping. https://www.cdc.gov/tobacco/e-cigarettes/health-effects.html

2. National Institutes of Health. NIH-funded studies show damaging effects of vaping, smoking on blood vessels. October 26, 2022. Reports findings from Mohammadi et al., Arteriosclerosis, Thrombosis, and Vascular Biology (2022). https://www.nih.gov/news-events/news-releases/nih-funded-studies-show-damaging-effects-vaping-smoking-blood-vessels

3. Lyytinen G, et al. Electronic Cigarette Vaping with Nicotine Causes Increased Thrombogenicity and Impaired Microvascular Function in Healthy Volunteers: A Randomised Clinical Trial. Cardiovascular Toxicology. 2023;23:255-264. doi:10.1007/s12012-023-09802-9. https://doi.org/10.1007/s12012-023-09802-9

4. Centers for Disease Control and Prevention. Health Effects of Cigarettes: Cardiovascular Disease. https://www.cdc.gov/tobacco/about/cigarettes-and-cardiovascular-disease.html

5. Centers for Disease Control and Prevention. How to Quit Smoking. https://www.cdc.gov/tobacco/about/how-to-quit.html

Sources checked October 14, 2026. Educational article draft; not individualized medical advice.