ExcitaCor contains Vicia faba as a source of 3,4-dihydroxyphenylalanine (L-DOPA), the precursor to dopamine. ExcitaCor also contains an extract of the adaptogen, Rhodiola rosea, a source of biologically-active rosavins. NeuroScience's Rhodiola is standardized to contain 16% rosavins, which have been found to decrease the effects of stress and fatigue. The semi-essential amino acid histidine is important for the production of histamine, which stimulates the production of ACTH and the release of metabolism enhancing glucocorticoids.