Somebody has misled you, please do not mess it up. There is no where proven that vitamin c
injection can kill tumor
cells in the body. Indeed consuming vitamin c containing foods reduces the incidence of cancer but does not stop it. Vitamin C is an anti-oxidant helps in rejuvenation
of the weak cells in the body and reduces the incidence of cancer to a certain extent and also keep the body fit.
Dr. Naveen Kumar