c ration cigarettes C-rations included in the army Foil lined as per originals). Sold at Auction: VIETNAM WAR

"The interaction of tobacco, and especially nicotine, with brain chemistry is a fascinating area that we're just beginning to understand, especially when it comes to correlating neurochemistry with behavior," said study leader Jon-Kar Zubieta, a psychiatrist and neuroscientist at the university

With all of the changes in the tobacco market, is plain packaging arriving too late

Mac Baren Plumcake pipe tobacco is a mixture of Virginia and Burley tobaccos, dark spicy Cavendish and a hint of Latakia

And more recent studies have found these metals are associated with a plethora of negative health effects, such as popcorn lung - inflammation in the lungs which causes wheezing, coughing and shortness of breath