If you are an existing smoker and if your device and liquid are from a reputable supplier, absolutely yes. The problem is that a lot of the industry is not rep

If you are an existing smoker and if your device and liquid are from a reputable supplier, absolutely yes. The problem is that a lot of the industry is not reputable and not well controlled. This means that you can get liquids that contain all sorts of things and devices that heat in an uncontrolled way. Even the perfect liquid if overheated (as it is in many large devices) produces aldehydes. As you might expect, breathing formaldehyde is bad. The industry also seems to be taking the opportunity to up the nicotine numbers, so if your intention is to give up that's not helping.