Boericke & Tafel - Heal Yourself Naturally. B&T was founded in 1835 and is the leading manufacturer of natural homeopathic medicines. According to the National Center for Homeopathy, "Homeopathy is a system of medicine that is based on the Law of Similars. The truth of this law has been verified experimentally and clinically for the last 200 years. How does the concept of homeopathy differ from that of conventional medicine? Very simply, homeopathy attempts to stimulate the body to recover itself."