Our new analysis shows that the American middle class lost ground in the vast majority of metropolitan areas from 2000 to 2014, and the shares of adults in the lower- and upper-income ranks rose in most areas. There was more movement into the upper-income tier in about half the areas, while in the other half there was more movement downward.
http://www.consumergenetics.com/caffeine_test.php. The lethal dose of caffeine is 2 grams of caffeine per day, that is, 80-100 cups of coffee a day.For slow metabolizers of caffeine, the lethal dose of caffeine can be lower.t's dependent on weight & individual sensitivity & estimated to be about 150-200 milligrams/kilogram of body mass. ChaCha on! [ Source: http://www.chacha.com/question/what-is-a-lethal-dose-of-caffeine ]. More Answers to  What is a lethal dose of caffeine .
Report Abuse. The lethal dose of caffeine is pretty high--40 grams, or the equivalent of 80 cups of coffee. To date, the weight of scientific evidence has established no causal link between coffee consumption and cardiovascular disease. The lethal dose of pure nicotine is 40-60 mgs.he LD50 (Lethal Dose 50% - i.e. the level at which half of an affected group will likely die) nicotine dose for an adult human being is around 60mg. Your numbers weren't way off, just a bit high.