Mucuna Pruriens Extract (seed) (Yielding 500mg L-Dopa per serving) (540mg) SST-1: GH is based primarily upon the active ingredient L-DOPA (also called Levodopa or L-DOPA) (L-3,4-dihydroxyphenylalanine). L-DOPA is extracted from mucuna pruriens or velvet bean seeds. It is the precursor of the neurotransmitter dopamine which itself is the precursor of neurotransmitters nor-epinephrine and epinephrine. DOPA is consumed to generate dopamine; supporting healthy mood and mental alertness. It has been known for over 40 years that L-DOPA is an effective stimulant of Human Growth Hormone (HGH) which has many benefits including improved sense of well being, increased muscle mass and protein synthesis, increased lean muscle, higher energy levels, increased endurance, increased flexibility, increased libido (sexual performance) and improved immune function. However, the challenges such as poor blood brain barrier penetration always caused the ingredient to only be marginally effective.