The FDA doesn't know if flavored vaping chemicals are safe to breathe Salon.com A Review of Toxicity Mechanism Studies of Electronic Cigarettes on Respiratory System Study shows vapes emit more lead than 20 packs of cigarettes yes, *20.* New research has uncovered a disturbing truth about popular disposable vapes: they may be more toxic than Glyphosate: Hepatotoxicity, Nephrotoxicity, Hemotoxicity, Carcinogenicity, and Clinical Cases of Endocrine, Reproductive, Cardiovascular, and Pulmonary System Intoxication ACS Pharmacology & Translational Science