Dr. Kellerstein was born April 23, 1953 in Toronto, Ontario, Canada.
Dr. Kellerstein graduated from the University of Toronto in June 1976, with special interests in physiology and zoology. He received his chiropractic degree in 1980, his naturopathic degree in 1984, and graduated from the Canadian Academy of Homeopathy in 1991.
He has been in practice since 1983 providing chiropractic and homeopathic care. His principal homeopathic teachers include Andre Saine and Robin Murphy.
Dr. Kellerstein was the first Chairman of the Department of Homeopathy with the Canadian College of Naturopathic Medicine.
He currently teaches a post-graduate program Hahnemannian Perspectives at the Canadian College of Homeopathic Medicine.
Dr. Kellerstein's practice involves the use of NLP and Clean Language techniques to increase the patients ability to model a more complete case.