Standardized Mucuna Extract Naturally Occurring 15% L-Dopa Dopamine is a neurotransmitter that promotes enjoyment and interest in life.* With 15% L-Dopa (the immediate precursor of dopamine), NOW Dopa Mucuna helps the body with what it needs to make this important neurotransmitter.* Mucuna has been used in the traditional Ayurvedic system in India for thousands of years. Natural color variation may occur in this product.