Tyrosine is an important non-essential amino acid, which can be found in many high-quality protein foods. Some important hormones and transmitters such as thyroxine, noradrenaline, and adrenaline are derived from tyrosine in the body.
Carnitine is a substance similar to an amino acid, which in living cells is necessary for the transport of fatty acids to the mitochondria. Fatty acids in the mitochondria can be broken down through a biochemical process called beta-oxidation.