Author: asb

Amino acids and proteins are the building blocks of life as well as a source of energy by the body. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to help the body:

• Break down food
• Grow
• Repair body tissue

Amino acids are classified into three groups:

Essential amino acids cannot be made by the body. As a result, they must come from food.
The nine essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

"Non-essential" means that our bodies produce an amino acid, even if we don't get it from the food we eat. They include: alanine, asparagine, aspartic acid, and glutamic acid.

Conditional amino acids are usually not essential, except in times of illness and stress. They include: arginine, cysteine, glutamine, tyrosine, glycine, ornithine, proline, and serine.

Tryptophan is needed for normal growth in infants and for nitrogen balance in adults.

The body uses tryptophan to help make niacin and serotonin. Serotonin is thought to produce healthy sleep and a stable mood.

In order for tryptophan in the diet to be changed into niacin, the body needs to have enough: Iron, Riboflavin and Vitamin B6.

Tryptophan can be found in: Cheese, Chicken, Eggs, Fish, Milk, Nuts, Peanut butter, Peanuts, Pumpkin seeds, Sesame seeds, Soy, Tofu and Turkey.

http://www.nlm.nih.gov/medlineplus/ency/article/002332.htm

A branched-chain essential amino acid that has stimulant activity. It promotes muscle growth and tissue repair. It is a precursor in the penicillin biosynthetic pathway.Leucine, isoleucine and valine, make up about one-third of muscle protein.

http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=6287

An isomer of LEUCINE; it is important in hemoglobin synthesis and regulation of blood sugar and energy levels.

http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=6306

An essential branched-chain amino acid (BCAA) important for hemoglobin formation; unique among amino acids for its regulatory roles in metabolism, including translational control of protein synthesis and glycemic regulation

Together, insulin and leucine allow skeletal muscle to coordinate protein synthesis with physiological state and dietary intake.

http://www.ncbi.nlm.nih.gov/pubmed/10418071

Histidine is required for the production of HISTAMINE.

http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=6274