Three people with advanced cancer were found to have increased survival times after receiving intravenously administered high-dose vitamin C. Double blind placebo controlled trials conducted on oral vitamin C therapy was found to show no benefit in cancer patients. Oral vitamin C given at the maximum recommended dose of 18g/d led to a blood concentration of only 220 micromol/L. In comparison, at the same dose, intravenous administration of vitamin C led to a 25-fold increase in blood concentration. Intravenous doses of 50-100g vitamin C result in a blood concentration around 14,000 micromol/L. In laboratory studies, a blood concentration of 1,000 micromol/L vitamin C damages cancer cells, but does not harm healthy cells. New research should be pursued in IV vitamin C for cancer treatment. (6)
