A fact that would have gone uncovered if cigarette companies had their choice:
The three most popular brands chosen by young smokers — Marlboro, Newport and Camel — all delivered significantly more nicotine as the years passed. Virtually all brands were found to deliver a high enough nicotine dose to cause heavy dependence. This trend has escaped notice because the standard government test uses a machine that fails to mimic real-life smoking. When Massachusetts required the manufacturers to use a more realistic method, the nicotine yields were more than twice those found on the standard test.
