Many people are very ignorant about the effects and risk of vaping (ignorance is a lack of understanding or knowledge). My hunch is that no matter what info you dig up saying its safe, your family members will still not approve of it. I learned a long time ago not to feel guilty for doing things that others don't approve of. It's not their life, its yours. But I will give you some info that may persuade them. Cigarettes have anywhere from 2,000 to 7,000 POISONOUS chemicals in them. Ejuice only has 4 possible ingredients, the base usually being made up of a combination of propylene glycol and vegetable glycerin, both chemicals that are used in food processing, flavoring and nicotine. There is also 100% vegetable glycerin ejuice, which if it contains flavoring and nicotine would only have 3 ingredients and if it contains either no nicotine or no flavoring, would only be 2 ingredients. Vaping hasn't been around long enough to know the long term effects of inhaling these chemicals, but purely by the law of averages has to be safer than smoking combustible tobacco. That is to say, there is inherently far less risk from inhaling a vaporized substance that only contains 4 chemicals than there is in smoking cigarettes. Also the flavoring used in ejuice is food quality. So what you are inhaling is a food quality liquid that may contain nicotine and is vaporized by an electronic device. I hope this helps.