Dopamine is a neurotransmitter that promotes enjoyment and interest in life. Containing 15% L-DOPA (the immediate precursor of dopamine), NOW DOPA Mucuna provides the body with what it needs to make this important neurotransmitter. Mucuna pruriens, commonly known as Velvet Bean, has been used in the traditional Ayurvedic system in India for thousands of years. NOW DOPA Mucuna is 100% vegetarian.