My buddy's ex-father in law almost died from them too. He drank 11 of the 24oz. cans in one day. He broke out into hives and had to be rushed to the ER. There's a lot of metal in those drinks and his body was just over loaded with that and caffeine/gaurana/ginsing/taurine. They said one more of those and he woullda been dead. Even the 16oz. cans have a warning....3 per day or less. I have like 1 a month!!!