Amino acids are the building blocks of proteins and are fundamental to many functions and are the main components of e.g. muscles, hormones and neurotransmitters. The various bodily functions affected by amino acids and their resulting protein and enzyme levels vary from mood to sleep patterns and concentration. Due to their role in repairing and building muscle, bodybuilders find amino acid supplements particularly interesting, along with those who do not get enough food – a particular problem for vegetarians. There are twenty different amino acids, all of which are used in combination and alone to keep the body at its peak. Although there are eight essential amino acids, all twenty have their uses and can be used as a supplement. Amino acid blends combine amino acids in tested mixtures that can be effectively used by the body for various purposes. Dietary supplements with amino acid blends can be used to supplement a low-protein diet with a wide range of amino acids, or also to find a targeted amino acid blend.