I love coffee but now limit my caffeine at the instructions of my doctor after my Myocardial Infarction (heart attack).
He said that caffeine is a vein constrictor and heavy use over time will cause hardening of the arteries and heart disease. Nicotine does the same thing. You clever vapers might be dodging the big C by substituting the pen for the smokes but heart disease is just as deadly, even more so if you look at the numbers.
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