Juul Introduces Checkout System to Combat Underage Purchases WSJ DYKOne Juul pod contains as much nicotine as a pack of cigarettes. Side effects include increased heart rate and blood pressure, lung disease, chronic bronchitis and insulin resistance leading to type 2 Teens say they don't vape, they 'Juul.' That makes the activity hard to track Los Angeles Times FDA to order Juul e cigarettes off U.S. market, report says