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.
431.   What is meant when someone says that something was "Steved?"
  [jake/2006-05-21]
430.   How can I migrate my encrypted gpassman files to ascii?
  [jake/2006-05-20]
409.   What is a nice tip for automating updates on debian systems?
  [jake/2004-03-30]
402.   What is Rape Juice?
  [jake/2004-01-28]
399.   What are some common methods of radio-based navigation?
  [overcode/2004-01-03]
398.   How can I fix dhclient in debian stable with the 2.6 kernel?
  [leif/2003-12-20]
366.   What is a really good german street map website?
  [jake/2003-07-10]
362.   How do I make Internet Explorer download more than 2 files at a time?
  [matt/2003-06-17]
( strick/2003-06-21 )
323.   what does a tftp boot error "too many packages" mean?
  [jesse/2002-09-05]
321.   what is jesse's first rule of backpacking?
  [jesse/2002-08-13]
309.   What does the YAK do about SPAM?
  [strick/2002-02-26]
261.   Which companies belong to the DVD Copy Control Association (DVD CCA) as of 08-2001?
  [rupe/2001-08-03]
239.   What's the Grubstake?
  [rupe/2001-06-05]
211.   Who are strick's net.gods?
  [strick/2001-04-08]
( rupe/2001-05-22 rupe/2001-05-22 )
201.   Where are Mir, the Shuttle, and the ISS right now?
  [rupe/2001-03-22]
151.   How can I tell ICANN to screw off?
  [fury/2000-12-09]
84.   How do I send mail from a Python script?
  [rupe/2000-05-10]
69.   What is the origin of The Yak?
  [strick/2000-02-28]
29.   Where can I find out about the DVD hack?
  [strick/2000-02-06]
24.   Why is the ocean blue?
  [simon/2000-01-20]
16.   Where are the SF Bay Area Cypherpunk physical meetings?
  [strick/2001-04-08]
1.   From whom did The Yak borrow the idea of Frequently Questioned Answers?
  [strick/2000-01-19]