L-Dopa (L-3,4-dihydroxyphenylalanine) is an amino acid that is formed in the liver and converted into dopamine in the brain. It is essential for integrated movement of individual muscle groups.
Dopamine apparently does not enter the brain from the blood, and is ineffective when it is medically administered. L-Dopa enters the brain through the blood and then it is converted into dopamine.
It is recommended that you consult your professional health care provider before supplementing L-Dopa into your daily diet.