No Risk-Free Nicotine Use: Review Maps Biological Hierarchy of Cardiovascular Harm Across All Delivery Methods

A comprehensive review published in Nature Reviews Cardiology provides the most detailed picture yet of how nicotine查看药品详情 damages the cardiovascular system, tracing the biological chain of events from the moment nicotine binds to receptors in blood vessel walls through to the atherosclerotic plaque rupture that triggers heart attacks and strokes. Led by Professor Thomas Münzel from the University Medical Center Mainz (搜索)搜索该词条, Germany, the international research team integrated mechanistic, biomarker, preclinical, and clinical data across all major nicotine-containing products for the first time.

Tobacco use and nicotine查看药品详情 addiction remain among the leading preventable causes of premature death worldwide. In 2023 alone, more than 1 billion people globally smoked tobacco, causing an estimated 5.81 million deaths from direct tobacco use and a further 1.66 million deaths among non-smokers exposed to second-hand smoke. Close to 40% of these deaths are attributable to cardiovascular disease (搜索)搜索该疾病.

Two Independent Routes of Vascular Attack

The review describes how nicotine查看药品详情 attacks the vessel wall through two independent routes. In the endothelial lining, it suppresses prostacyclin — a natural vasodilator — and triggers release of endothelin-1查看药品详情, one of the body's most powerful vessel-constricting hormones. Separately, nicotine acts directly on the vascular smooth muscle cells that control vessel tone, blocking ATP-sensitive potassium channels and disrupting calcium handling, which favors constriction even when the endothelium itself is undamaged.

"Nicotine查看药品详情 doesn't only disable the vessel's protective lining — it directly tightens the muscle around it," said Professor Münzel. "These are two separate attack routes converging on the same outcome: a vessel that constricts more, relaxes less and clots more easily."

The analysis of molecular biology studies and clinical trials demonstrates that nicotine查看药品详情 damages the blood vessels, increases oxidative stress, constricts blood vessels, and raises blood pressure and the risk of thrombosis. Among other effects, nicotine inhibits potassium channels in vascular smooth muscle, as well as the production of the enzyme eNOS (搜索)搜索该靶点 (endothelial NO synthase) and the hormone prostacyclin, impairing their vasoprotective and vasodilatory properties.

A Hierarchy of Cardiovascular Harm

Building on this mechanistic map, the review establishes a consistent, evidence-graded hierarchy of vascular harm across product categories: highest with combustion products (cigarettes and waterpipes), then heated products, followed by aerosol devices (e-cigarettes), then oral nicotine查看药品详情 products (chewing tobacco and pouches), with abstinence the only risk-free option.

"E-cigarettes and heat-not-burn devices were initially marketed as reduced-risk alternatives to combustible cigarettes, but our data show these products sit on a continuum of cardiovascular risk, not off it," said Professor Münzel. "Removing combustion clearly reduces harm – but it does not remove it."

The research team systematically combined three levels of evidence that have rarely been considered jointly until now: detailed data on toxic constituents and emissions, preclinical animal studies on vascular and endothelial mechanisms, and large-scale clinical and biomarker studies. "The result is unambiguous: combustion causes the greatest toxicity, but no nicotine查看药品详情-containing product – whether smoked, heated, vaped or taken orally – is risk-free for the cardiovascular system," emphasized lead author Professor Münzel.

Nicotine as an Active Driver of Disease

Professor Filippo Crea, an author of the review, noted that the work "closes an important evidence gap by evaluating, for the first time, existing mechanistic, biomarker and clinical data side by side across products, rather than product by product in isolation. It is apparent that nicotine查看药品详情 is an active driver of endothelial dysfunction, the earliest step on the path to atherosclerosis (搜索)搜索该疾病, hypertension (搜索)搜索该疾病 and heart failure (搜索)搜索该疾病 – and only abstinence is risk free."

The authors highlight that nicotine查看药品详情 is marketed as little more than a mild stimulant, comparable to caffeine. However, nicotine's dependence-forming potential is ranked alongside that of cocaine and heroin. "Nicotine's cardiovascular toxicity at the molecular level, combined with its well-documented, high dependence-forming potential make the case for a coherent, nicotine-based regulatory framework rather than the current patchwork of product-specific rules," said Professor Münzel.

These effects were measurable even after a single exposure to nicotine查看药品详情, and occurred across all delivery methods. "Nicotine is not an inert component that merely sustains addiction. Rather, it causes measurable, reproducible vascular damage. This has been demonstrated in animal models as well as in healthy volunteers and clinical cohorts," explained Professor Münzel.

Implications for Regulation and Public Health

This research underscores why the European Society of Cardiology查看公司主页 (ESC) and the EU are calling for updated tobacco and nicotine查看药品详情 regulation as an integral part of the Safe Hearts Plan. "The evidence is clear that nicotine cannot be considered harmless. We must take this seriously in how these products are regulated, marketed and communicated to the public, especially to young people," said Professor Thomas F. Lüscher, President of the European Society of Cardiology and an author of the review.

The review calls for greater efforts to prevent the initiation of nicotine查看药品详情-product consumption, particularly among young people, given the risk of addiction and lifelong exposure trajectories. In addition, integrating taxation, flavor bans, and evidence-based cessation support are highlighted as being essential to end the evolving epidemic of nicotine-containing product consumption.