Dr Cathcart, M.D.
http://www.orthomed.com/index.htm  

[2009] Vitamins: It's The Dose That Does it "I have been consulted by many researchers who proposed bold studies of the effects of massive doses of ascorbate (vitamin C). Every time the university center, the ethics committee, or the pharmacy committee deny permission for the use of massive doses of ascorbate and render the study almost useless. Seasoned researchers depending upon government grants do not even try to study adequate doses."---Robert F. Cathcart III, M.D

Dr. Robert F. Cathcart said, "I started using vitamin C in massive doses in patients in 1969. By the time I read that ascorbate should cause kidney stones, I had clinical evidence that it did not cause kidney stones, so I continued prescribing massive doses to patients. Up to 2006, I estimate that I have put 25,000 patients on massive doses of vitamin C and none have developed kidney stones. Two patients who had dropped their doses to 500 mg a day developed calcium oxalate kidney stones. I raised their doses back up to the more massive doses and added magnesium and B-6 to their program and no more kidney stones. I think they developed the kidney stones because they were not taking enough vitamin C."  [2010 Oct] About "Objections" to Vitamin C Therapy

 Cathcart RF. Vitamin C, titration to bowel tolerance, anascorbemia, and acute induced scurvy." Medical Hypothesis 7:1359-1376, 1981. http://www.doctoryourself.com/titration.html