Vaping without nicotine can be considered safe in comparison to smoking traditional cigarettes, which contains more than 7000 chemical substances. According to a report by the Public Health England, the overall risk associated with nicotine-free vaping is 95% lower than the risk from smoking traditional cigarettes. Additionally, a review from the American Association of Public Health Physicians states that the harm from nicotine-free vaping is minimal.
Although the data does suggest that vaping without nicotine is a much safer alternative to smoking traditional cigarettes, the potential for harm cannot be entirely excluded. There are potential risks associated with vaping, even if it does not contain nicotine, such as chemicals and ultrafine particles that can potentially lead to long-term damage to the respiratory system. As such, the answer to whether or not nicotine-free vaping is safe still needs more research to be able to make a definitive statement.