Alanine is a naturally forming chemical found in a variety of foods especially meats. This non essential amino acid is used in the production of protein. It assists the body in metabolizing various components such as glucose and can also play a part in lowering cholesterol. It is suggested that an Alanine supplement be used with people who have a diet low in protein and who may be exposed to adverse effects of a protein deficiency. Alanine is also linked to an increase in the efficacy of the immune system and a reduction of toxins in the system.

Arginine is a non-essential amino acid that is needed by the body for the proper functioning of the liver, skin, joints, and muscles. It helps improve the immune system by increasing the T-lyphocytes output from the thymus gland. Arginine also neutralizes the effects of ammonia and toxic substances by detoxifying the liver. It is beneficial to most athletes particularly body builders because arginine helps in the production of creatine in the body and stimulates the excretion of growth hormones that aids in the development of muscle mass. It also helps improve the metabolism and in fat loss. Arginine also promotes the healing and repair of damaged tissues.

Aspartic Acid is a non-essential amino acid which is bountiful in plant proteins. It can also be produced in the human body from oxaloacetic acid. Some biochemicals that are synthesized from aspartic acid include asparagine, arginine, lysine, methionine, threonine, isoleucine, and a number of nucleotides. Apartic acid is used for stamina, the brain and overall health as it helps the liver by removing excess harmful ammonia and other toxins from the bloodstream. If ammonia enters your circulatory system it can be harm your central nervous system and cause neural and brain disorders. Aspartic acid helps to keep the mind sharp by increasing concentrations of NADH in the brain.

Cystine is a non-essential sulfur containing amino acid. Our body can supply cystine on its own. Cystine is important for vitamin B6 utilization and is a detoxifying agent. It removes toxins absorbed by body through alcohol and smoking and protects body from damage of brain and liver. Cystine increases the level of glutathione, which is a powerful antioxidant and helps in detoxifying harmful toxins in the liver. As Alpha-keratin, the protein that makes up the skin, fingernails and hair contains cystine; it is also used in anti-aging products. It is also useful for faster healing of burns and wounds, for low count of white blood cells and in skin diseases.

Glutamic Acid is an excitatory neurotransmitter, which enhances firing of neurons in central nervous system. Glutamic acid is a main excitatory neurotransmitter in brain and spinal caord. It is transformed either into glutamine or gamma-aminobutyric acid – the two other amino acids which assist in transmitting messages to brain. Glutamic acid plays a vital role in metabolism of fats and sugars, and assists in transporting potassium into spinal fluid and across the blood-brain barrier. Though it doesn’t cross the blood-brain barrier as readily as is done by glutamine, it is present in blood at high levels and may reach the brain in small amounts. The brain can utilize glutamic acid as a fuel. It assists in correcting personality disorders and is helpful in treating childhood behavioral disorders. It is also used in treating mental retardation, epilepsy, ulcers, muscular dystrophy, and hypoglycemic coma.

Glycine is an amino acid acting as a transmitter of the nerve impulses. It reduces the spinal nerves action by supplying skeletal muscles. Glycine tastes sweet and is hence added to soft drinks so that it masks the aftertaste of saccharin bitterness. This is an organic compound and is found in animal proteins. Glycine takes active participation in the free state in many significant reactions such as the biosynthesis of heme which is indeed one the important constituents of hemoglobin. The glycine defects in metabolism are rare. This acid is however not essential as diet as it can be available from other substances to the body. This was the foremost acid to get isolated from protein. Glycine is employed in pharmaceutical applications. Glycine is sold as United States Pharmacopeia as well as technical grade. However, the USP grade has diverse uses. The technical grade may sometime not reach the standards or USP grade, but is widely used in industrial applications for metal finishing.

Histidine is among the 20 standard amino acids that exist in proteins. Nutritionally, it is considered an essential amino acid in infants. After growing up, humans start to synthesize histidine and thus it turns into a non-essential amino acid. Different histidine compounds, such as anserine, carnosine, and ergothionine, are found in blood and tissues. Key sources of histidine include dairy, poultry, meat, and fish, besides wheat, rice and rye. Histidine is required for growth, tissue repair, and maintenance of myelin sheaths that protect nerve cells. It is also needed for synthesis of red and white blood cells, and assists in protecting the body from damage rendered by radiation. It helps remove heavy metals from the body. It also helps produce gastric juices in the stomach. Histidine can help with sexual arousal, functioning and enjoyment.

Isoleucine- An important essential amino acid is isoleucine which is also part of the three “branched chain amino acids” along with leucine and valine. Since it is an essential amino acid it cannot be synthesized in the body and thus isoleucine has to be ingested in the diet (almonds, chicken, eggs, cashews, fish, lentils, liver, meat etc.). Isoleucine is required for muscle recovery and also for the formation of haemoglobin. Isoleucine also assists in regulating blood sugar levels and energy levels. It is also involved in blood-clot formation. Isoleucine deficiency is present only in those people who are lacking in protein intake. Deficiency may lead to dizziness, fatigue, depression etc. Excessive amounts of isoleucine doesn’t seem to be a problem though it isn’t recommended for those with kidney or liver disease.

L-Phenylalanine gained notoriety with the aspartame controversy where extensive internet bombardment against the artificial sweetener prompted a thorough cleaning by The Coca Cola Company and other interest groups. Now it seems that aspartame has more benefits to health than aspirin. L-Phenylalanine is an essential alpha amino acid that is deemed analgesic and antidepressant. It is hydrophobic and nonpolar, one of only twenty common amino acids that are used to produce protein as coded by the DNA. L-Phenylalanine can also convert into L-Tyrosine, which can then become L-DOPA, going forth to become norepinephrine, dopamine or epinephrine. Phenylalanine is very often found in foods, protein rich foods like meat, milk and milk products, poultry and fish, but also as already mentioned in the artificial sweetener aspartame.

Leucine is an essential amino acid. It is also known as 2-Amino-4-methylpentanoic acid. It is found in soy protein, chick peas, wheat grams, almonds, peanuts, oats, etc. Leucine is a food additive used to enhance flavor; its E number is E641. It is also used in many dietary supplements because a research conducted on rats showed that it significantly increases the synthesis of muscle protein thus slowing down degradation of muscle tissue. If consumed in excessive amounts it can also cause Leucine toxicity.

Lysine is an essential amino acid that is sometimes also referred to as amino acid K. It is effective in preventing atherosclerosis which causes the walls of the arteries to harden caused by deposits of lipoproteins or fats. It is able to loosen and preventing the deposits of fats and reduces the risks of stroke and hypertension or high blood pressure. It also promotes the production of carnitine that converts fatty acids into energy. It also controls the blood pressure level. Lysine also helps in the absorption of calcium that keeps the bones healthy. It also promotes collagen production that is important in maintaining the joints and connective tissues healthy.

Methionine is an amino acid that is found in meat, fish, beans, eggs, lentils, onions and seeds. It contains sulphur that is essential for the production of glutathione. It helps the body get rid of toxins, build strong and healthy tissues, and promote a healthy cardiovascular system. It helps breakdown fats and promotes weight loss. It also prevents the build up of fats in the arteries that reduce the risk of arteriosclerosis. Methionine promotes proper digestion and gets rid of toxins and heavy metals in the body. It helps cleanse the body from toxins. It also helps relieve pains caused by arthritis. It helps in alleviating the mood, and treat depression.

Milk is a liquid produced by the mammary glands of mammals. Humans generally consume milk of goats and cows. Cow’s milk contains proteins, fats, lactose and minerals. It supplies 66 kcal of energy per 100 grams. Studies show that low-fat milk can reduce risk of heart disease and arterial hypertension. It contains Conjugated linoleic acid. Milk is shown to decrease risk of insulin resistance, and full fat milk is shown to slightly increase fertility in women. Milk is a good source of protein and many protein supplements are also manufactured from milk, which are used by athletes and bodybuilders for muscle growth.

Proline is an amino acid. The body has the capability to produce Proline with glutamic acid. Proline works well with vitamin C, which make it more potent. It helps particularly in maintaining and repairing damaged tissues, skin and muscle. It heals damaged cartilage, and helps maintaining flexible joints. It benefits parts of the body where collagen is found, such as blood vessels, tendons, skin, bones, and including the eye. It prevents and reduces the sagging, wrinkling and aging of skin. It ensures that the body has the proper supply of collagen, guarding it against future joint and spine problems. It also enhances the immune system.

Serine is a non-essential amino acid derived from amino acid glycine and is beneficial to both mental and physical health.It is vital for proper functioning of brain and central nervous system. Serine helps form phospholipids that are needed to make every cell in the body. It also is helpful in muscle formation and maintaining a strong immune system. Proteins used to form the brain, and the protective myelin sheaths covering nerves, contain serine. It is also required for producing amino acid tryptophan, which is used to make serotonin, a chemical that determines mood. Shortage of serotonin and tryptophan has been associated with depression, confusion, insomnia, and anxiety. Decreased serine levels can lead to chronic fatigue syndrome and fibromyalgia.

Threonine is an essential amino acid that plays an important role in the function of the body. It helps break down uric acid to be used for the production of purines. It helps prevent illness such as gout, and arthritis. It is also important in the synthesis of the amino acid glycine. Threonine also helps balance the blood sugar level in the body by converting glucose in the liver through gluconeogenesis. Threonine also prevents the accumulation of fatty tissues in the liver. It also improves the immune system. Threonine promotes the production and formation of proteins elastin and collagen that have strong antioxidant properties.

Tryptophan is an essential amino acid found in turkey, chocolates, milk, cheese, fish, banana, and oats. It is converted by the body into serotonin which plays an important role in the controlling the mood, appetite, sleep and impulses. It is also used as a treatment for attention deficit hyperactivity disorder (ADHS), smoking, teeth grinding, and anxiety. It is also effective in alleviated premenstrual syndrome (PMS) such as mood swings, nausea, and pains. It also improves athletic performances by increasing energy, and endurance. It also helps reduce weight by stimulating the metabolism. Tryptophan increases the production of growth hormones. It also plays an important role in the production of niacin or vitamin B3.

Tyrosine is a non essential amino acid derived from several sources, including soy, poultry, milk and cheese products, but can also be synthesized in the body from phenylalanine. There are twenty amino acids that are used in human cells to synthesize proteins, one of which is tyrosine. It is of vital importance to the carbon dioxide conversion into organic compounds conducted by plants, the photosynthesis. Tyrosine is also recognized as a precursor to hormones, but also alkaloids and pigments. It is furthermore viewed as a precursor to neurotransmitters; it increases the levels of plasma neurotransmitters, most prominently norepinephrine and dopamine. While under normal circumstances the effects of tyrosine are inconclusive, it has been observed as useful in stress situations and to reduce the effects of a cold, fatigue, sleep deprivation and any kind of prolonged labor.

Valine- One of the several essential amino acids present in the human body is Valine. This is also a nonpolar, branched chain amino acid which is found in high concentrations in the muscles. Since it is an essential amino acid, valine is not synthesised in the body and thus must be ingested as part of the diet. Valine is available through foods like fish, poultry, peanuts, sesame seeds, lentils and cottage cheese. Valine is essential for muscle, growth and repair of tissue and for maintaining the body’s nitrogen balance. Since it has a branched chain, valine can be used as an energy source in the muscles and thus conserves glucose. Hence valine is often used by bodybuilders to support muscle growth and provide energy. A deficiency of valine in the body, caused by the inability of the body to metabolise valine leads to the Maple Syrup Urine Disease in which the person’s urine smells like maple syrup.