Dr. Robert George Tupac DDS br Dr. Robert George Tupac br Dr. Robert Tupac DDS br Dr. Robert Tupac br Robert George Tupac DDS br Robert George Tupac br Robert Tupac DDS br Robert Tupac br br "When I graduated from University, we weren't given any information about where [fluoride] came from," br says Dr. Robert George Tupac DDS, a former Navy practitioner who also had a private dental practice for 20 years, br in the documentary FIRE WATER: Australia's Industrial Fluoridation Disgrace. br "We all assumed it was [pharmaceutical-grade] calcium fluoride.