Sure Cleanse Keto Also, it is also necessary for the production of other molecules such as tyrosine, another amino acid that is also part of the structures and tissues, and catecholamines, hormones produced by the adrenal glands such as epinephrine, norepinephrine and dopamine, These hormones are responsible for regulating the mood and the body's response to a stress situation.What is phenylalanine for?