FDA reverses ban on Juul vape products, which remain on shelves Today, FDA sent a warning letter to JUUL Labs for marketing unauthorized modified risk tobacco products (MRTP) by engaging in labeling, advertising and or other activities directed to consumers, including a presentation given The FDA's War on Juul Will Kill Smokers Juul granted FDA marketing approval C Store Dive FDA authorizes Juul e cigarette device and menthol and tobacco pods