Vapes don't just contain "flavor." Most include nicotine, chemicals, and heavy metals that can affect lung and brain health. Swipe to see what's really inside Knowledge helps families make informed choices. # Vaping Prevention Banner: Vaping: A Bad Decision Are e cigarettes harmful? Many students believe that vaping harmless, which is far from the truth. Vape pens can contain potentially harmful substances such as chemicals linked to lung disease, cancer causing chemicals, heavy metals such as