The brand uses salty nicotine-based juices for its devices. This is a liquid substance without any solid inclusions. Therefore, when heated, it doesn't produce the combustion products that are found when you smoke regular tobacco. Thus, the composition of the vape refill is safer for your body and has less impact on it.
But it is worth remembering that if you are allergic to the ingredients of the liquids or to nicotine itself, you should avoid vaping and cigarettes altogether.