Gregory Dana Ullman (born December 22, 1951) is an American author, publisher, journalist, and proponent in the field of homeopathy.
Ullman received his Master of Public Health (MPH) from the University of California at Berkeley, and has since taught homeopathy and integrative health care.
Ullman served as an instructor in homeopathy at the University of California at San Francisco, and as member of the Advisory Council of the Alternative Medicine Center at Columbia University's College of Physicians and Surgeons. In previous years he has been the chairperson for the National Center for Homeopathy's Annual Conference, and has been consulted by Harvard Medical School's Center to Assess Alternative Therapy for Chronic Illness. He is also a regular speaker at universities, medical schools, pharmacy schools, and hospitals.
- California Alumni Association (1999-02). Q&A with Dana Ullman. Alumni Magazine. University of California Berkeley's California Alumni Association. Retrieved on 2008-01-22.
- Dana Ullman, - Healthworld Online - HealthWorld Online, HealthWorld Online - Natural health and Alternative medicine information, products and services.. Retrieved on 2008-01-25.
- Penguin Group USA. About Dana Ullman. Retrieved on 2008-01-24.