here’s a rundown of the ingredients in the 5 hour energy drinks (I use them on occasion)
The B-complex vitamins are actually a group of eight vitamins, which include:
thiamine (B1)
riboflavin (B2)
niacin (B3)
pantothenic acid (B5)
pyridoxine (B6)
cyanocobalamin (B12)
folic acid
biotin
These vitamins are essential for:
The breakdown of carbohydrates into glucose (this provides energy for the body)
The breakdown of fats and proteins (which aids the normal functioning of the nervous system)
Muscle tone in the stomach and intestinal tract
Skin
Hair
Eyes
Mouth
Liver
Some doctors and nutritionists suggest taking the B-complex vitamins as a group for overall good health. However, most agree that the best way to get our B vitamins is naturally—through the foods we eat!
Citicoline Studies suggest that CDP-choline supplements increase dopamine receptor densities,[1] and suggest that CDP-choline supplementation can ameliorate memory impairment caused by environmental conditions.[2] Preliminary research at Harvard found that citicoline supplements help improve focus and mental energy and may possibly be useful in the treatment of attention deficit disorder.[3]
Tyrosine is a nonessential amino acid the body makes from another amino acid called phenylalanine. It is a building block for several important neurotransmitters, including epinephrine, norepinephrine, serotonin, and dopamine. Neurotransmitters help nerve cells communicate and influence mood.
Phenylalanine an essential amino acid, is a derivative of alanine with a phenyl substituent on the β carbon. Phenylalanine is quite hydrophobic and even the free amino acid is not very soluble in water.
(warning to those with PAH here http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=gene&part=pku )
Taurine supports neurological development and helps regulate the level of water and mineral salts in the blood. Taurine is also thought to have antioxidant properties.
Taurine is found naturally in meat, fish and breast milk, and it’s commonly available as a dietary supplement. Some studies suggest that taurine supplementation may improve athletic performance, which may explain why taurine is used in many energy drinks. Other studies suggest that taurine and caffeine act together to improve athletic and perhaps even mental performance, although this finding remains controversial.
Up to 3,000 milligrams of supplemental taurine a day is considered safe. Any excess taurine is simply excreted by the kidneys. Moderation is important, however. Little is known about the effects of heavy or long-term taurine use. It’s also important to remember that other ingredients in energy drinks, such as high amounts of caffeine or sugar, can be harmful. For example, too much caffeine can increase your heart rate and blood pressure, interrupt your sleep, and cause nervousness and irritability.
Malic Acid – Malic acid is an organic dicarboxylic acid found in wines, sour apples, and other fruits. An acidulant is a substance added to food or beverages to lower pH and to impart a tart taste . Phosphoric acid is an acidulant added to cola drinks. Malic acid is used as an acidulant as well as a flavoring agent in the processing of some foods. In addition to food uses, malic acid is sometimes used in cosmetics to adjust the pH. Preliminary animal studies indicate that malic acid may reduce injury
Side Effects
Impaired sexual desire and performance, increased coagulation, inhibited libido, sexual arousal, sexual vigor and sexual performance, mild erectile dysfunction.
Glucuronolactone
Glucuronolactone is a naturally occurring chemical produced by the metabolism of glucose in the human liver. It is an important structural component of nearly all connective tissues.[1] Glucuronolactone is also found in many plant gums.
Glucuronolactone is a popular ingredient in energy drinks. Most of these drinks contain caffeine, but Glucuronolactone is included because it not only supplies energy, it also increases feelings of well-being
Glucuronolactone has been clinically proven to reduce sleepiness and sleep-related driving incidents under conditions of afternoon monotonous driving following sleep restriction the night before.1 It is widely known to improve mental performance, reaction time, concentration and memory.2,
Caffeine
Provides a boost of energy and feeling of heightened alertness. Caffeine also facilitates the rapid absorption of nutrients, including B-vitamins. Original 5-Hour Energy contains caffeine comparable to a cup of the leading premium coffee. Extra Strength 5-Hour Energy contains caffeine comparable to 12 ounces of the leading premium coffee. Decaf 5-Hour Energy contains about as much caffeine as a half cup of decaffeinated coffee.