L-DOPA (Standard) is the analytical standard of L-DOPA. This product is intended for research and analytical applications. L-DOPA (Levodopa) is an orally active metabolic precursor of neurotransmitters dopamine. L-DOPA can cross the blood-brain barrier and is converted into dopamine in the brain. L-DOPA has anti-allodynic effects and the potential for Parkinsons disease[1][2][3].