In an overlooked study first published in 2008, for the first time, using a special liposomal form of oral-dose vitamin C, researchers in Britain demonstrated it is possible to achieve cancer-killing blood concentrations of this vitamin without undesirable side effects.
Heretofore, National Institutes of Health Researchers claimed the maximal concentration of vitamin C that can be achieved following oral intake is not sufficient to produce a cancer-killing effect. Now British researchers demonstrate they were able to achieve blood concentrations of vitamin C that were twice what was incorrectly reported to be maximal, and in the range of what is known to be selectively toxic to tumor cells, yet not harmful to healthy cells.
Studies with various forms of cancer show a 30%-to-50% cancer cell-killing effect at the same blood concentration of vitamin C achieved in this study. For comparison, anti-cancer drugs are approved by the FDA if they achieve 50% tumor shrinkage.