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 like an amino acid, which in living cells is necessary for the transport of fatty acids into the mitochondria. Fatty acids in the mitochondria can be broken down through a biochemical process called β-oxidation.