What Henningfield and Benowitz suggest, then, is that tobacco companies be required to lower the level of nicotine so that even the heaviest smokers—those smoking, say, 30 cigarettes a day—could not get anything more than five milligrams of nicotine within a 24-hour period. That level, the two argued in an editorial in the prestigious New England Journal of Medicine, “should be adequate to prevent or limit the development of addiction in most young people. At the same time it may provide enough