Energy Drinks Red Bull and Monster Contain Bull Sperm

Story: 

Energy Drinks Red Bull and Monster have bull sperm in them.

Other Versions

1. Red Bull Energy Drink contains sperm from a bull.
2. Q: Do energy drinks have bull sperm in it?
Answer: Yes. A study done by longhorn cattle company, tested some of the top energy drink brands (red bull, monster, etc) and found that they do contain bull sperm.

Hoax or Fact:

Hoax.

Analysis:

These messages circulating online since few years claim that the energy drinks like Red Bull and Monster contain Bull Sperm. To support this, a study supposedly done by Longhorn Cattle Company is mentioned. Not really!
The message, which keeps spreading through social media and other sites often causes angst and revulsion among people. However, there is no evidence that energy drinks like Red Bull and Monster contain Bull sperm. The mentioned Longhorn Cattle Company is actually a Barbeque restaurant in the Rio Grande Valley, Texas, and there are no credible reports that the company or any other one has conducted any studies to have discovered bull sperm/semen in energy drinks. The rumor appears to be related to the fact that some energy drinks like Red Bull and Monster contain a chemical ingredient called Taurine, which is claimed to be found in Bull Semen and Urine.

What is Taurine?

Taurine is an amino acid, naturally found in meat, fish and breast milk, and is commonly available as a dietary supplement -- because it supports neurological development and helps regulate the level of water and mineral salts in the blood. Taurine, named after the Latin word Taurus, means Bull or Ox, and was first isolated from Ox bile in 1827 by German scientists. However, Taurine is a major constituent of bile and can be found in the large intestine and tissues of many animals, including humans.
The Taurine used in Red Bull (and most other energy drinks) is not derived from Bull or any other animal, it is in fact synthetically produced in lab, as explained by Red Bull Company in a related Q&A:

Is Taurine made from bull's testicles?

Many people bet it comes from some delicate parts of the strongest and most potent bulls in the world, but the fact is that the Taurine in Red Bull is produced synthetically to the highest quality standards.

For your information, there have been few concerns about heavy and regular intake of Taurine in energy drinks, and so moderate intake is suggested.

References:

Taurine is listed as an ingredient in many energy drinks. What is Taurine? Is it safe?