how many chemicals are in e cigarettes Students and Vaping Vaping: How E-cigs Work (Infographic)

See FDA regulations for tobacco product manufacturers at www.fda.gov

That would make sense if it's compacting too much in the middle, Though I don't notice it if the tobacco is just at the right RH

They have many opportunities to do so including when: people buy nicotine replacement therapies products people buy other over-the-counter medicines such as cough medicines repeatedly dispensing medicines for smokers with conditions such as high blood pressure They are ideally placed to provide information on the range of available medicines and provide advice about the use of these medicines

Australas Marketing J (2011)