Barlowe's Herbal Elixirs offer several herbal aphrodisiacs, testosterone boosters and stimulants. Their approach is unique in that they offer herbs with the active ingredient highly concentrated. Even then, it may require two capsules to be effective. This makes more sense than combining small amounts of many unconcentrated herbs and expecting to get results from one capsule. The prices are very reasonable and the capsules are filled manually, without fillers or preservatives.