Vapes on black market may contain toxic chemicals, pesticides, harmful flavorings New study reveals the worst e cigarette flavor to inhale and it's a popular one E cigarette flavors are toxic to white blood cells, warn scientists My Worst Play The Real Cost Great question! Here's a clear comparison of smoking vs. vaping, especially in the context of surgical and skin health (like facelift outcomes): Smoking (Tobacco) WORSE overall Key Harms: