Vitamin C is vitamin C. Cancer patients have certain benefits of eating vitamin C, which can improve immunity and so on, but has no role in treating cancer. Vitamin C oral dosage form for tablets, this product pharmacological studies show that the drug can participate in tissue repair in the body, conducive to iron absorption, increase the use of carbohydrates, maintain immune function, promote the absorption of non-heme iron and other effects. Vitamin C is mainly used for the prevention of scurvy, as well as auxiliary treatment of acute and chronic infectious diseases. Long-term application of large amounts of vitamin C can cause oxalate stones, diarrhea, skin redness, headache, frequent urination, nausea and vomiting. It is prohibited for those who are allergic to this product. Vitamin C has no role in the treatment of cancer, the presence of cancer needs to be early consultation, under the guidance of a physician reasonable standardized treatment, regular follow-up follow-up, so as not to miss the condition.