http://blog.fooducate.com/2012/07/12/that-taurine-in-your-energy-drink-10-things-to-know/
7. The urban myth that taurine is derived from bull sperm is false. Taurine is present in bull sperm, but that is not the source of taurine in your beverages. Taurine, like many other additives in today’s foods, is synthesized in a lab.
9. Is Red Bull good for me? No. Red Bulls contain an extremely high amount of sugar. The taurine in an energy drink isn’t enough to have a positive effect on your health.