Is Vaping Without Nicotine Safe? V2 Cigs UK Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking The Right to Vape The Atlantic Vaping Impairs Vascular Function, Even Without Nicotine, Study Finds Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports