although in the USA it's the young raver types that I see drinking red bull, the drink originates in Austria, and in neighboring Hungary it's the old men standing outside the medicinal baths that i see drinking red bull. i've been told that *they* believe it's made from bull testicles, and drink it to increase their virility. and the package does say it's made with "taurine" -- what else would that be? oh, ok, just an amino acid.
Here's a excellent urban-legend-smashing page dealing with the bull testicles and other favorite rumors about governments banning red bull for containing Glucuronolactone.
424.   Where do you get StrickPants?
  [strick/2007-06-30]
394.   I've heard of RTFM, but what does STFW mean?
  [matt/2003-11-12]
( matthew/2004-08-11 )
368.   Do Laws of Physics apply to Software such as PostgreSQL and MS Windows 95/NT?
  [strick/2003-08-25]
354.   What is a secure alternative to irc that doesn't suck like irc over ssl?
  [jake/2003-03-02]
349.   Hey my money just got ripped off by my bank. They said I made a debit but I didn't!
  [jake/2003-02-21]
326.   How do I make an RJ-45 connector into a hardware loop back device (is that an ethernet jammer in your pocket) ? (or how the hell do you boot an Indy with out an ethernet cable)
  [jake/2002-10-05]
212.   Where can you get free juice / ice cream in SFO, April 2001?
  [rupe/2001-04-17]
195.   why wont my computer boot off of its hard drive?
  [jesse/2001-03-11]
( strick/2001-03-12 )
139.   How do real programmers write code?
  [rupe/2000-10-25]
107.   Where can I find out how to install and use the distributed rendering package PVMPOV?
  [rupe/2000-07-04]
83.   What's the best way to send mail as stdin to a program, using sendmail?
  [rupe/2000-04-28]
72.   What happens when you smoke weed every day for a year and then quit cold turkey.
  [vonguard/2000-04-04]
63.   What does the accronym ENIAC stand for?
  [simon/2000-02-19]
31.   Was Ross at Kevin Mitnick's release?
  [strick/2000-01-23]