The dangers of vaping

The hazards of e-cigarettes are clear and multifaceted. They are not safe alternatives. The risks mainly stem from the harmful chemicals in the aerosol, the highly addictive nicotine, and the direct damage to the respiratory and cardiovascular systems.

Harmful Chemicals in Aerosol
The aerosol produced by heating the e-liquid in e-cigarettes is not harmless "water vapor". It contains various toxic substances and carcinogens.

Carcinogens: High-temperature heating of propylene glycol and glycerin generates carbonyl compounds such as formaldehyde and acetaldehyde. Additionally, carcinogens such as polycyclic aromatic hydrocarbons and nitrosamines are detected in the aerosol.

Heavy metals: Metal components in the atomizer may release lead, cadmium, nickel, chromium, and other heavy metal particles when heated, which deposit in the lungs and can cause inflammation and fibrosis.

Other harmful substances: The aerosol contains over 200 chemical substances, including arsenic, mercury, solvents, and volatile organic compounds.

Respiratory System Damage
The harm of e-cigarettes to the respiratory system is manifested from short-term irritation to long-term serious diseases.

Acute and chronic effects: Short-term exposure can lead to oxidative stress, inflammation, and airway barrier dysfunction. Users often report symptoms such as coughing, shortness of breath, and breathing difficulties.

Increased disease risk: E-cigarette use increases the incidence of airway hyperresponsiveness, lung tissue damage, and asthma.

Carcinogenic risk: A 2025 systematic review indicates that e-cigarette use has a potential association with an increased risk of lung cancer, especially in dual users of traditional cigarettes and e-cigarettes, where the risk is higher.

Cardiovascular System Hazards
Nicotine and other chemicals cause immediate and long-term damage to the cardiovascular system.

Immediate response: Acute use of e-cigarettes causes an average increase of about 11 beats per minute in heart rate and an average increase of about 13 mmHg in systolic blood pressure.

Long-term damage: Long-term inhalation of e-cigarette aerosol promotes oxidative stress, inflammation, and aortic tissue fibrosis, significantly damaging vascular function. An international study also confirmed that all modern nicotine products, including e-cigarettes, will damage vascular function, increase blood pressure, and increase the risk of cardiovascular diseases.

Arrhythmia risk: A 2026 study also found that synthetic coolants in e-cigarettes may cause arrhythmias, increasing the risk of sudden cardiac arrest.

Nicotine Addiction and Brain Impact
The vast majority of e-cigarettes contain highly addictive nicotine, which is extremely harmful to the brain, especially in the brains of teenagers.

High addiction: Nicotine causes rapid dependence and is difficult to quit once addicted.

Damage to the adolescent brain: Exposure to nicotine in teenagers affects brain development, potentially leading to learning disabilities, attention deficits, memory loss, and may exacerbate stress, depression, and anxiety.

The "gateway" to smoking: Teenagers who use e-cigarettes are at least twice as likely to start using traditional cigarettes later.

⚠️ Severe Acute Pulmonary Injury (EVALI)
EVALI is an acute pulmonary inflammatory syndrome related to the use of e-cigarettes and potentially life-threatening.

Causes: Although the exact cause is not fully clear, vitamin E acetate (often illegally added to THC products) is strongly associated with the outbreak of EVALI. However, there are also cases unrelated to vitamin E.

Symptoms: Include shortness of breath, fever, cough, chest pain, vomiting, diarrhea, headache, and dizziness. Seek medical attention immediately if these symptoms occur.

Risks for Special Populations and Observers
Children: Due to their developing respiratory systems, they are more vulnerable to acute pulmonary injury and other serious harms.

Pregnant women: Exposure to e-cigarettes may increase the risk of premature birth and low birth weight in newborns.

Second-hand aerosol: The second-hand aerosol produced by electronic cigarettes also contains nicotine and harmful chemicals, which can pollute indoor air and pose health risks to others, especially children and pregnant women.

Summary
In summary, the harms of electronic cigarettes cover multiple aspects, including chemical substance exposure, respiratory and cardiovascular system damage, addiction, and severe acute lung injury. The World Health Organization clearly does not recommend using electronic cigarettes as a smoking cessation tool. Many users eventually develop a dual-use habit of both cigarettes and electronic cigarettes, suffering from compounded health risks.