Erik van Woensel has been studying homeopathy since 1977. He started practising homeopathy in 1982. Since 1990 he has been teaching at several schools. In 1995, he opened the Educatief Centrum voor Homeopathie that later merged with the Opleidingscentrum Klassieke Homeopathie (OCKH). In 2007, he founded the Archive for Homeopathy.
He supervises several groups of beginning and experienced homeopaths regarding their cases. He is the author of various books. His aim is to spread homeopathy by teaching and writing, to research possibilities of homeopathy and make this public, to bring the appliance of homeopathy to a higher level and improve homeopathic literature.