Consider this. Many veterinarians use a concentrated form of caffiene to put animals down! Yet we ingest it will little regard for our own well being. We have so little regard for ourselves, that we now can market canned death, an not even care! But then, you can also drink too much water, and die also. Until we can all learn not to live on the 'edge' we'll continue to see even more people using any form of substance to get buzzed, all just to relieve their boredom!
Energy drinks have two to three times the caffiene than a cup of coffee. What excessive caffeine does to the body thru time is it causes to overwork the heart which causes irregular heart beat and or cause heart attacks