As the building blocks of proteins, amino acids are fundamental for many functions, comprising the main components in such things as muscle, hormones, and neurotransmitters. The variety of bodily functions affected by amino acid and their resulting protein and enzyme levels range from mood to sleep patterns to concentration. Because of their role in repairing and building muscle, body builders will find amino acid supplements particularly interesting, along with those who do not get enough from their diet – a particular concern for vegetarians. There are twenty different amino acids, all of which are used in combination and alone to keep your body at peak performance. Though there are eight essential amino acids, all twenty have their uses and can be used in supplement. Amino acid blends combine amino acids into tested mixes that can be efficiently used by the body for differing purposes. Amino acid blend supplements can be used to enhance low protein diets with a wide variety of amino acids, or also to find a targeted amino acid mixture.