New Evidence Shows Vascular Health Improves After Quitting Smoking - Including When Switching to E-Cigarettes

https://academic.oup.com/eurjpc/advance-article/doi/10.1093/eurjpc/zwag123/8496698?login=false

This new systematic review brings together an experienced international team of clinicians and cardiovascular researchers, including Professor Jacob George, Professor Riccardo Polosa, and colleagues from across Europe and Asia. The authors include specialists in cardiology, vascular medicine, and preventive health, several of whom have long-standing research backgrounds in smoking cessation, cardiovascular risk, and harm reduction. Their multidisciplinary expertise strengthens the clinical relevance of the analysis and reflects a rigorous approach to evaluating prospective vascular outcomes.

This is an important piece of evidence in a debate that is often full of loud opinions but not enough focus on how the body actually works.

A new review published in the European Journal of Preventive Cardiology looked at what happens to people’s blood vessels after they quit smoking or switch completely to e-cigarettes. It analysed 23 studies involving more than 11,700 people.

The overall finding was straightforward: when people stop smoking, their blood vessels start to function better. And people who switched entirely to e-cigarettes showed similar improvements in the same direction.

Why is that important?

Because heart disease is the number one cause of death in smokers. Smoking damages the lining of blood vessels and makes arteries stiff. If you remove the smoke, you would expect the blood vessels to recover. That’s exactly what this review found.

The researchers looked at three well-known measures of blood vessel health. These aren’t vague statistics, they’re medical tests that show how flexible and healthy arteries are. Healthier readings on these tests are linked to lower heart disease risk over time.

Here’s what the review found in simple terms:

People who quit smoking showed consistent improvements in blood vessel health.

Some improvements were visible within a month.

Benefits were still seen up to two years later.

The strongest evidence (from randomised trials) showed moderate confidence that blood vessel function improved.

Studies of people who switched to e-cigarettes also showed improved blood vessel function, whether the vape contained nicotine or not.

That last point matters.

It suggests that the main problem for blood vessels is smoke from burning tobacco, not nicotine by itself. This fits with decades of heart research showing that it’s the thousands of toxic chemicals in cigarette smoke that damage arteries.

The authors are careful. They rate the overall certainty of the evidence from “very low” to “moderate,” depending on the outcome. That doesn’t mean there’s no effect. It means the studies weren’t perfect and varied in design. Where stronger trials were available, confidence was higher.

The review does not say vaping is harmless. It does not say there is zero risk. What it says is much simpler and more grounded:

When smokers stop inhaling burning tobacco, their blood vessels begin to recover.

That makes biological sense. It fits what we already know about smoking and heart disease. And it’s now supported by multiple forward-looking studies.

Youth prevention still matters. Non-smokers shouldn’t start using nicotine. But for adults who already smoke, the real question isn’t “Is it perfectly safe?” The question is “Is it safer than continuing to smoke?”

This review adds evidence that removing smoke, even if nicotine remains, leads to measurable improvements in heart-related health markers.

In short, if you remove combustion, you reduce harm.