The Daily Journalist.
Vitamin C has a patchy history as a cancer therapy, but researchers at the University of Iowa believe that is because it has often been used in a way that guarantees failure.
Most vitamin C therapies involve taking the substance orally. However, the UI scientists have shown that giving vitamin C intravenously–and bypassing normal gut metabolism and excretion pathways–creates blood levels that are 100 – 500 times higher than levels seen with oral ingestion. It is this super-high concentration in the blood that is crucial to vitamin C’s ability to attack cancer cells.