Vaping exposes users to toxic metals like lead and uranium, study says AOL Kids Health Info : Vaping and e cigarettes Scientists astonished by highly toxic feature found in popular vape products: 'So high I thought our instrument was broken' Disposable vapes release more toxic elements than tobacco smoke Disposable vapes might look harmless with their fun colors and sweet flavors, but scientists have just uncovered a disturbing truth: these devices can pack a toxic punch even stronger than regular cigarettes.