Are E-Cigarettes Less Harmful Than Traditional Cigarettes? Not Necessarily

As the vaping industry enters a thriving phase, the topic of whether "e-cigarettes are less harmful than traditional cigarettes" has sparked much controversy. Today, we focus on this issue.
 
E-cigarettes may not necessarily be less harmful than traditional cigarettes.

For a long time, businesses have promoted e-cigarettes as being free of tar, suspended particles, and other harmful components, even marketing them as "smoking cessation tools" and "lung cleansers."

However, the safety of e-cigarettes has not been fully scientifically validated. To date, there is no systematic safety assessment data for e-cigarettes, both domestically and internationally, so we cannot yet determine what potential health risks e-cigarettes may pose to users.

In terms of composition, e-cigarettes are more complex than traditional cigarettes. Currently, the main components of e-cigarette liquids on the market include propylene glycol (PG), vegetable glycerin (VG), flavorings, nicotine, and additives. Among these, propylene glycol is a low-toxicity substance that can be harmful to the human body, and some additives also contain harmful components.

Studies have shown that when using e-cigarettes, people may inhale various undiscovered toxic compounds in addition to nicotine. Meanwhile, the secondhand smoke produced by e-cigarettes can also pose health risks. E-cigarettes release inhalable liquid fine particles and ultrafine particles, nicotine, and carcinogens into indoor air.

An analysis by the U.S. FDA revealed that one-quarter of adverse event reports related to e-cigarettes were associated with secondhand exposure, such as respiratory irritation, eye irritation, sore throat, headaches, nausea, dizziness, and respiratory difficulties in children.

Mao Qun'an, Director of the Planning Department of the National Health Commission, pointed out: "Current domestic and international research shows that the aerosol produced by e-cigarettes contains many toxic and harmful substances. The various additive components in e-cigarettes also pose health risks. Additionally, many e-cigarette products have unclear nicotine concentration labels, which can lead to users consuming excessive amounts. Furthermore, e-cigarette devices also pose safety risks such as battery explosions, liquid leakage, and high-temperature burns."

There are many concerns in the medical community regarding the safety and long-term effects of e-cigarettes, especially concerning cardiovascular diseases. These concerns can be summarized as follows:

1. Many people who use e-cigarettes to quit smoking continue to use e-cigarettes after one year, and some individuals use both traditional cigarettes and e-cigarettes long-term.

2. The intake of nicotine is related to cardiovascular diseases. The nicotine content in one e-liquid cartridge is equivalent to that in a pack of cigarettes.

3. E-cigarettes have been found to contain tobacco-related toxins similar to those in traditional smoking, but at lower concentrations. Using both can lead to an additive effect of toxins.

4. Short-term use of e-cigarettes can disrupt the autonomic nervous system, raise blood pressure, increase heart rate, and elevate C-reactive protein (a marker of inflammation related to cardiovascular diseases). Long-term use of these reactions may increase the risk of cardiovascular diseases, including heart attacks and strokes.

5. One important component of e-cigarettes, flavoring agents, can also harm cardiovascular function. A report published in May in the Journal of the American College of Cardiology (JACC) indicated that these flavoring agents have strong cytotoxicity and can lead to endothelial dysfunction.