Investigators at the University of Madras in Chennai, India tested the effects of Mucuna pruriens seed extract on general mating behavior, libido and potency of normal male rats. The extract administered orally significantly increased the mounting frequency, intromission frequency and ejaculation latency, and decreased the mounting latency, and inter-intromission interval. They say, "Resulting aphrodisiac activity of the extract lends support to the claim that it has traditionally been used for the treatment of sexual disorders."
Comments: I have personally found this herb to be useful as an aphrodisiac. The herbal extract is available as a supplement by itself, or combined with other aphrodisiac herbs in Passion Rx. See http://www.raysahelian.com/mucunapruriens.html