Ergo-Log had an interesting article on the herb Holy Basil which just happens to contain Ursolic acid. "Testosterone levels go off the scale with holy basil. Holy basil, or Ocimum sanctum, is an herb that originally comes from India. In animal studies done at Sharma University of Health Sciences it sends testosterone levels so high that researchers can't measure them. And no, they weren't using high-tech extracts, but ordinary fresh leaves of the plant. Holy basil goes by the name of tulsi in India. In Asia it is used for cooking and in Ayurvedic medicine. Ocimum sanctum contains among other things oleanolic acid, ursolic acid, rosmarinic acid, eugenol, carvacrol, linalool and beta-caryophyllene."