Caffeine- The bitter, white crystalline xanthine alkaloid caffeine is found in tea, coffee, soft drinks, chocolates, pain relievers, and a variety of over the counter medications. It is a psychoactive stimulant drug that causes increased alertness by stimulating the central nervous system. For the same reason, many people feel more energetic after consuming it. It even elevates the mood but these effects do not last for long. The effects of caffeine usually last for about five to six hours, though caffeine sensitivity varies from person to person. It has been found that people who consume lot of caffeine on a daily basis soon develop less sensitivity and may need to increase their intake to enjoy the same effect. Being a diuretic, a person consuming caffeine may have to urinate more often.

L-Arginine AKG is a salt of amino acid arginine and alpha-ketoglutaric acid, and is widely used as a body building supplement. Its components assist in the metabolism of nitric oxides. Arginine and alpha-ketoglutarate are forerunners of polyamines and nitric oxide, which take part in a number of metabolic functions. Its supplements enhance growth hormone and insulin secretion with anabolic effects in postoperative patients. Their intermediary metabolites, glutamine and proline, can also help promote recovery from trauma. In animal studies, it increased the levels of glutamine and arginine in skeletal muscles and stimulated the immune system function as compared to animals which did not receive it. It can also improve host-defense mechanisms, especially during injury and acute stress.

L-Glutamine- Found in plasma and muscles of the human body, L-Glutamine is an essential amino acid. In the skeletal muscle cells, more than 60% of free floating amino acid is made of L-Glutamine. It acts as the primary donor of nitrogen and moves in the body wherever required. This amino acid has been considered useful in reducing physical stress. During surgery or heavy exercise regime the human body needs it for maintaining the level of glutamine in muscles and blood. It is also essential for maintenance of immune system and prevention of intestinal stress. Glutamine supplements can help in restoring L-Glutamine levels during stress. L-Glutamine supplements are relatively less expensive and help in minimizing the breakdown of muscles. It also improves the metabolism of protein in the human body and ensures a positive balance of nitrogen.

L-Lysine is an essential amino acid obtainable from daily food sources we consume. It has many medicinal properties which benefit us in our daily lives. While it is mainly used in the treatment of herpes, it also helps us become stronger by building our muscle tissues. It helps us to recover form injuries and surgeries besides absorbing calcium for building healthy bones. It also regulates the production of antibodies, enzymes and hormones which are required for healthy immunity level. L-lysine when consumed in high doses can lead to serious conditions. Although L-lysine is important for good health, we never really realize we are consuming it. Deficiency of L-lysine causes lethargy, amnesia, enzyme disorders, reproductive problems and hair loss. Generally, L-lysine is present in all vegetarian and non-vegetarian foods. Fish and cereals have higher amount of L-lysine in them.

L-Ornithine is a nonessential amino acid. It is increasingly being used as a dietary supplement in powdered form by bodybuilders and sports men because research shows that it is used by body to produce L-arginine and L-proline. Some research also claims that it is used by body to produce polyamines. L-Ornithine also stimulates the release of growth hormone by the pituitary gland. Other health benefits of L-Ornithine include increase in anabolic and imunomodulatory activities. There are no reported side effects of L-Ornithine when taken properly, however, if taken in amounts higher than 10 g/day it may cause nausea, abdominal cramps and diarrhea.

L-Ornithine Alpha-Ketoglutarate (OKG) is produced from the interaction of two amino acids, ornithine and glutamine. These two protein building blocks are considered to be semi-essential amino acids because these are ordinarily synthesized by the body but certain conditions require additional amounts from external sources. Cases like overexposure to stress, recovery from severe trauma and illness may need supplementation of ornithine and glutamine. It has been noted that OKG possesses potent anabolic or body building properties. While increasing energy, muscle mass and endurance, OKG also prevents muscle breakdown for energy, fatigue and adipose tissue deposition. Alpha-ketoglutarate (AKG) may also be helpful in the generation of usable energy in the Krebs Cycle by its conversion to glutamine. L-ornithine and alpha-ketoglutarate work synergistically for better conditions for any exercise or training programs and promotion of wound healing after traumatic injuries or surgeries. The use of OKG post-operatively is now being done in France to achieve better and faster wound healing. As of to date, no known adverse reactions and drug interactions have been noted with OKG.

L-Taurine , which contains cysteine and methoinine is an essential amino acid. It acts as a diuretic by maintaining the level of magnesium and potassium in our cells while purging sodium. It improves the functioning of kidney and gets rid of fluid accumulation and swelling and thus keeps our body away from toxicity. It maintains a good balance of calcium in our body and strenghtens the heart muscles too. L-Taurine is also used in the treatment of progressive eye conditions, hypertension, memory loss, cystic fibrosis and in atherosclerosis. It is often mixed in energy drinks because while working out the level of L-taurine drops in the skeletan muscle, L-taurine supplements lowers the level of exhaustion and improves endurance. Besides being found in meat and egg yolks it is abundantly found in shellfish.

NADH or nicotinamide adenine dinucleotide hydrogen is a double nucleotide and is the reduced form of NAD. It acts as an electron carrier in the body. Chemically it is composed of two nucleotides adenine and nicotinamide joined through their phosphate groups.

Vitamin B3, commonly called Niacin, exists in two main forms, niacin and niacinamide. The niacin form produces a flushing and itching of the skin when taken at higher dosages and this feeling is only temporary.

Yohimbe is a tree that grows in different parts of Western Africa. Active compounds called alkolids are present in its bark with Yohimbine being the principal alkaloid. Yohimbe bark extracts are available in health food outlets. You can also buy it online. These extracts are promoted as a product that increases sex drive and for the treatment of erectile dysfunction. However, there is proof of their effectiveness. Most studies are concerned with the drug Yohimbine and not herbal extract Yohimbe. The side effects of Yohimbe include anxiety and dangerous increase in blood pressure.