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Switching from cigarettes to vaping, even nicotine-free, may still harm your vascular health and increase heart disease risk, a new study reveals. While vaping removes many toxins found in cigarettes, the chemicals in vape liquids and flavors can irritate lungs and blood vessels.

Researchers compared nicotine-free vapes, nicotine vapes, and traditional smoking, finding all negatively affected blood vessel function, with nicotine vapes causing the most harm. Harmful substances include flavoring chemicals like diacetyl and heavy metals from coils.

Experts worry especially about young people starting to vape without prior smoking history, potentially leading to nicotine addiction and later cigarette use.

The takeaway: vaping is not risk-free, even without nicotine, and long-term effects on cardiovascular health could be serious.