DA in medical terms refers to dopamine, a neurotransmitter belonging to the catecholamine class, which is abundant in the brain and is involved in regulating many physiological functions of the central nervous system. If dopamine is dysregulated, it can easily lead to movement disorders, and the common Parkinson’s disease is caused by dopamine dysregulation. It is also the predecessor of norepinephrine, which has beta agonist effects, enhances myocardial contractility, causes a slight acceleration of heart rate, and constricts blood vessels, which can raise arterial pressure and dilate internal blood vessels, increasing blood flow to internal vessels and improving peripheral circulation, and can also be used to treat various types of shock. The source of dopa is mainly dietary protein, which contains tyrosine, which enters the body and is transformed by various enzymes to form dopa.