Nicotine does not cause smoking related disease, such as cancers and heartdisease. These are caused by other chemicals found in tobacco smoke. Nicotineis addictive however and it is why people continue to smoke despite knowingabout the harmful effects of tobacco. Nicotine in e-cigarettes poses littledanger to adult users. In order to prevent accidental poisoning of children,e-cigarettes and liquids should be stored away safely (just as you would withhousehold cleaning products and medicines, including NRT products).