Because vaping does not involve the same combustion process, it can expose users to lower levels of many harmful chemicals found in cigarette smoke.
For adults who already smoke, switching completely to a regulated vaping product may therefore reduce exposure to certain toxic substances. However, this does not mean vaping is risk-free.
E-cigarette aerosols can contain fine particles, metals, volatile organic compounds and other potentially harmful substances. Depending on the product and how it is used, these substances may irritate the respiratory system and contribute to inflammation.
Some users experience coughing, dry mouth, throat irritation or headaches. Researchers are also investigating possible cardiovascular effects and the consequences of prolonged exposure to vaping aerosols.
One of the biggest challenges is that modern e-cigarettes have not been studied over the same number of decades as conventional cigarettes. Scientists therefore cannot yet provide equally comprehensive estimates of their lifetime health risks.
