Found this fascinating article which goes through some of the ingrediants in the highly popular energy drink Red Bull (and other energy drinks) and saying what and how they work.

D-Pantothenol - D-Pantothenol is also known as vitamin B5, or Pantothenic acid. It is known to improve mood and boost energy. D-Pantothenol help turn fat into energy and increases metabolism.

Click here to read the full article (via Chronic Fatigue Syndrome Blog)