A neurotransmitter is a natural, biological chemical that helps transmit nerve signals in the body.
The most common natural source of L-dopa is a bean plant called Mucuna Pruriens, or velvet bean. Most supplemental forms of L-dopa are extracted from Mucuna Pruriens.
L-dopa is a popular supplement because it's been suggested that when L-dopa is in the blood stream it then enters the brain and is converted to dopamine, a very important neurotransmitter.* Dopamine is thought to be involved in mental process like voluntary muscular movement, motivation, reward system, sexual gratification, sleep, mood, attention, working memory, and learning.
What kind of product should you buy? Answer: First, L-dopa is not sold often as a standalone supplement, but you can buy Mucuna extract, and the active supplement in Mucuna products is L-dopa.