How to Inhale a Vape Properly: MTL, DTL & RDL 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 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 Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct Vaporizers Vape Mods Vaping Devices Smoke Tokz Olathe How to properly inhale vape?