Amino acids What is it? (physiology and clinical effects) Amino Acids are building blocks that make up proteins. Proteins are necessary for the building of muscles, ligaments, tendons, organs, glands, nails, hair, and bones. Proteins also play a crucial role in the proper functioning of enzymes and hormones, and help regulate the body's water balance. There are a total of twenty amino acids and they combine in specific units to make up different protein structures, each with unique physiological functions. Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are essential amino acids, meaning that they cannot be produced by the body, and must therefore come from the diet. Healthy sources of proteins include legumes, soy, grains, nuts, dairy products, fish, and organic and lean meats and poultry. Impaired absorption, infection, trauma, stress, drug use, age, and presence of other nutritional deficiencies can lead to deficiencies of essential amino acids. Copyright © 2006 R & G Global Holding LLC All rights reserved. www.myNDonline.com The information provided on myNDonline is not intended to replace or be used in place of medical advice given by a licensed healthcare professional.