Homeopathy is a natural medical science that makes use of dilutions of naturally occurring substances for treating a wide variety of illnesses. Dilution permits the utilization of virtually any naturally occurring substance. In homeopathy’s long history (since the late 18th century), the safety and efficacy of the therapy has been demonstrated in the successful treatment of millions of people.
Homeopathy is based on the Law of Similars. For example, the runny eyes and nose with sneezing that accompany the grating of raw onions are similar to typical symptoms of hay fever. One effective homeopathic remedy for hay fever is a dilution of Allium cepa (red onion). Note that the symptoms need not result from the same cause; as long as the symptoms are similar the remedy can work effectively to treat the ailment.