Many believe that e-cigarettes emit water vapor, but this isn’t actually correct. The “vapor” that you see coming out of an e-cig is not actual water vapor, but rather resembles an aerosol gas, which contains tiny particles composed of nicotine, artificial flavorings and preservatives, glycerin/glycols, and various other chemicals. Recent research suggests that the moist and warm conditions in the lungs keep these particles from evaporating, which could have some implications on health risks associated with e-cigarette use.

Essentially, whether you are vaping yourself or are exposed to secondhand e cig vapor from someone else, the emitted particles can have an immediate effect on your lungs. One of the main concerns is the small size of the particles, which are 50 times smaller than the width of a human hair. They can also linger in the air for an extended period of time and reach the deepest parts of our lungs, which would indicate that secondhand e cig vapor may not be as harmless as some might have thought. In fact, the particles are so fine that they are able to seep through the paint on painted walls.

It is true that e-cigarette use has vastly different health effects than what could be observed from conventional cigarettes. As nothing gets burned in an e-cig, the lack of combustion means that fewer cancer-causing chemicals are emitted from them. But the ultra-fine emissions from e-cigs still contain nicotine and various other additives that could be potentially dangerous to human health. Some flavorings, such as cinnamon, could be toxic when inhaled.

Research has demonstrated that exposure to the ultra-fine particles encountered when vaping or from secondhand e cig vapor has the potential to inhibit the dilation of blood vessels when needed and makes the platelets sticky, which could cause an increased heart attack risk.

In the end, researchers believe there is a probability that direct and secondhand e cig vapor is probably not as dangerous as the smoke emitted from regular cigarettes, but it doesn’t mean that it is safe. Even though most of the ingredients used to make e-cigarettes “juice” are considered as safe to ingest by the FDA, their effects while inhaled haven’t been thoroughly studied yet or aren’t understood well enough. This underscores the need for more research to be conducted so that we could have more information on the possible health effects associated with secondhand e cig vapor.

https://www.yahoo.com/health/secondhand-e-cig-vapor-can-penetrate-paint-what-113444498677.html