Smoking, vaping called a deadly combination for lung cancer risk UPI.com 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 Does Vaping Increase Your Risk of Cancer? Study finds lung cancer in mice exposed to nicotine vaping Does Vaping Cause Oral Cancer THANC Guide Irish Cancer Society position on e cigarettes Irish Cancer