Q&A: It’s Said that E-cigarettes can also Cause People to Inhale Formaldehyde, Which is more Carcinogenic than Ordinary Cigarettes. Is it True?

Q: It’s said that e-cigarettes can also cause people to inhale formaldehyde, which is more carcinogenic than ordinary cigarettes. Is it true?

A: This statement was first seen in a paper in the New England Journal of Medicine. Its experimental data are not completely unreliable, but there is a prerequisite, dry burning.

The so-called dry burning refers to the phenomenon that the heating wire continues to heat the oil-conducting cotton after the e-liquid is exhausted when using high-power Eleaf vape. Experiments by Greek scientist Konstantinos Farsalinos in 2016 showed that the conclusion on the carcinogenicity of e-cigarettes was drawn after frequent dry burning of e-cigarettes in the laboratory. However, in real life, dry burns are easily discernible by users, so the inhalation of aldehydes is much lower than laboratory data.

In addition, Dr. Farsalinos’ team also tested that the concentration of aldehydes released by e-cigarettes is related to the voltage, and the release equivalent of aldehydes at 5.0V is 7 to 8 times that of 4.2V.

The relationship between the release amount of formaldehyde, acetaldehyde, acrolein and acetone and the voltage of electronic cigarette.

It can be seen that when the voltage is below 4.0v, the release of aldehydes is extremely small. For example, the formaldehyde inhaled by 50 puffs of electronic cigarettes is less than 10 micrograms, and the harm is almost negligible.

It can be said that the use of high-power vape may indeed lead to excessive inhalation of formaldehyde due to dry burning, but the voltage of small cigarettes is generally lower than 4.0V, so it is difficult to say how many health risks are caused by inhaled trace formaldehyde.

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