Developed by 18th-century German physician Samuel Hahnemann, homeopathy (which means “similar suffering”) uses miniscule concentrations of natural plant, animal, or mineral substances to stimulate the body to heal itself. Homeopathy is based on the same ”similar” principles as conventional allergy treatment and vaccines, where a small dose of an allergic substance or inert form of a virus is given to bolster the immune system against a particular offender. In homeopathy, for instance, a minute dose of coffee (Coffea cruda) may be given to remedy insomnia, or poison nut (Nux vomica) to relieve nausea. Read more.