According to Wikipedia, Red Bull, the most advertised of these drinks, has health risks.
However, in an effort to stem this tide, herbalYODA developed an herbal sports tea blend shortly after creating Formula One (sold as ADVENTURX) in 2004. sportZtea is a blend of 5-6 herbs that provide you with nutrients supplying vitamins and minerals to support your health and hydration. No stimulants and no artificial sweeteners.
And for the man from Austria (not Dr. Mueller-Toeroek) that brought you Red Bull, remind him that you don't need all the stuff in RB to relieve jet lag. I guess you didn't consult this favorite herbalist.
" Origins of Red Bull
Red Bull was inspired by an energy drink from Thailand called Krating Daeng. Red Bull is the literal translation of Krating Daeng in Thai. (Krating = Bull, Dang = Red) The logo of redbull is even the same as logo of Krating Daeng. Dietrich Mateschitz, an Austrian entrepreneur developed the Red Bull Energy Drink brand. Mateschitz was the international marketing director for Blendax, a toothpaste company, when he visited Thailand in 1982 and discovered that Krating Daeng helped to cure his jet lag. Between 1984 and 1987, Mateschitz worked with TC Pharmaceutical (a Blendax licensee) to adapt Krating Daeng for the European market. At the same time Mateschitz and Chaleo Yoovidhya founded Red Bull GmbH; each investing $500,000 of savings and taking a stake in the new company. They gave the remaining 2% to Chaleo's son Chalerm, but it was agreed that Mateschitz would run the company. Red Bull GmbH launched the Red Bull in 1987, which is carbonated and not as sweet as Krating Daeng, the Thai energy drink. Red Bull entered its first foreign market (Hungary) in 1992, and the United States (via California) in 1997.
Red Bull has taken almost half of the US market for energy drinks, and up to 80% of the market in some other countries.
In 2006, Forbes Magazine listed Chaleo as being the 292nd richest person in the world with an estimated net worth of over $2.5 billion while Mateschitz was listed at number 317.
Marketed as an energy drink "to combat mental and physical fatigue", it contains, per 250 mL (8.4 U.S. fl. oz.) serving, about 21.5 g sucrose, 5.25 g of glucose, 50 mg of inositol, 1000 mg of taurine, 600 mg of glucuronolactone, vitamin B — 20 mg of niacin, 5 mg of vitamin B6, 5 mg of pantothenic acid and 5 μg of vitamin B12 , 80 mg of caffeine. The caffeine in one serving is similar to that found in an average cup of brewed coffee (typically 100 mg/250 ml cup, but 72 mg for a U.S. regular 6 fluid ounces cup of coffee) or twice as much as found in a can of Coke (40 mg/330 ml can). A sugar-free version has been available since the beginning of 2003. Sugar-free Red Bull is sweetened with aspartame and sucralose, as opposed to sucrose and glucose.
Red Bull has the flavor of a carbonated guarana drink. It is commonly used as a mixer with alcoholic drinks such as vodka, and is the base ingredient in a Jägerbomb.
A can of Red Bull from the United Kingdom states the ingredients as: Water, sucrose, glucose, sodium citrates, carbon dioxide, taurine, agave, glucuronolactone, caffeine, inositol, niacin, pantothenic acid, vitamin B6, vitamin B12, caramel and riboflavin. In comparison, a can of Sugar Free Red Bull from the United Kingdom states the ingredients as: water, acidity regulator sodium citrates, carbon dioxide, taurine, glucuronolactone, sweeteners (acesulfame K, aspartame), caffeine, inositol, niacin, pantothenic acid, vitamin B6, vitamin B12, thickener xanthan gum, colours (caramel, riboflavin).
Taurine is a naturally occurring organic acid in the human body and is also present in foods like poultry, fish, and scallops. In addition to being an antioxidant, it is mainly used by the body during physical exertion and stress. In its natural form, taurine is derived from animal tissue, having been first isolated from bull (Bos taurus) bile, hence the name "Red Bull"; however, the taurine used in the Red Bull drink is produced synthetically. It is also the first energy drink to list glucuronolactone in its ingredient list. Glucuronolactone is a carbohydrate involved in detoxification. The chemical naturally occurs in the human body, but is also present in foods like grain and wine. It has often been referred to have a similar taste to Dandelion & Burdock, a traditional British soft drink, drunk in the British Islands since about 1265. Traditionally it is made from fermented dandelion (Taraxacum officinale) and burdock (Arctium lappa) roots, and is naturally carbonated.
 Health effects
A review published in 2008 found no documented reports of negative health effects associated with the taurine used in the amounts found in most energy drinks, including Red Bull.
Commonly reported adverse effects due to caffeine used in the quantities present in Red Bull, are insomnia, nervousness, headache, and tachycardia (see Caffeine intoxication). In cases of extreme over consumption, death is possible.
A 2008 position statement issued by the National Federation of State High School Associations made the following recommendations about energy drink consumption, in general, by young athletes:
Water and appropriate sports drinks should be used for rehydration as outlined in the NFHS Document “Position Statement and Recommendations for Hydration to Minimize the Risk for Dehydration and Heat Illness.”
Energy drinks should not be used for hydration.
Information about the absence of benefit and the presence of potential risk associated with energy drinks should be widely shared among all individuals who interact with young athletes.
Energy drinks should not be consumed by athletes who are dehydrated.
Energy drinks should not be consumed without prior medical approval, by athletes taking over the counter or prescription medications.
 Anaerobic muscular endurance and work
A study conducted in 2007 on 15 healthy young adults, found that Red Bull consumption led to an acute increase in upper body anaerobic muscular endurance; however, no effect was found on either peak lower body anaerobic muscular work, or average lower body anaerobic muscular work.
 Cardiovascular effects
The results of a single study conducted in 2008 showed that the ingestion of one, 250mL can of sugar-free Red Bull, in a sample of 30 healthy young adults, had an immediate detrimental effect on both endothelial function, and normal blood coagulation. This temporarily raised the cardiovascular risk in these individuals to a level comparable to that of an individual with established coronary artery disease.
Based on their results, researchers involved with the study cautioned against the consumption of Red Bull in individuals under stress, in those with high blood pressure, or in anyone with established atherosclerotic disease.
Red Bull representatives, however, stated that this observed increase in cardiovascular risk was not felt to be different than that associated with drinking a regular cup of coffee. They also stated that they believed that Red Bull must be safe, as it was felt the only way Red Bull could have such substantial global sales is if various health authorities had concluded the drink safe to consume.
There has been at least one case report of Red Bull overdose causing postural orthostatic tachycardia syndrome in a young athlete.
A February 3, 2009 article in The Daily Telegraph called, "Red Bull 'may have triggered heart condition that killed student'" reported on the death of a 21 year-old woman who died after drinking four cans of Red Bull and several VKs, a vodka based drink which also contains caffeine. It was believed, but had not been proven, that she suffered from a rare heart condition called long QT Syndrome. She was on medication for epilepsy. A medical examination found that there were no illegal drugs in her system. The article quoted a doctor as saying, "The QT levels may have grown over a few years, or it may have been artificially pushed over the limit by caffeine." 
Energy Drinks May Be Harmful To People With Hypertension, Heart Disease
ScienceDaily (2009-03-26) -- People who have high blood pressure or heart disease should avoid consuming energy drinks, according to a new study. Researchers found that healthy adults who drank two cans a day of a popular energy drink experienced an increase in their blood pressure and heart rate. No significant changes in EKG measurements were reported. ... > read full article
Natural Health News has 38 posts with information about the toxic effects of sucralose (Splenda) and aspartame.