In mice grafted with human ovarian cancer cells, treatment with intravenous vitamin C combined with conventional chemotherapy slowed tumour growth, compared to chemotherapy treatment alone.
The team followed up on these results with a clinical trial in 25 people with ovarian cancer, 13 of whom received both chemotherapy and vitamin C injections. These people were less likely to report side effects from the chemotherapy treatment than those who received chemotherapy alone.
McConnell, who was not involved in the study, cautions that the approach might not work for every type of cancer. She notes that some cancers express low levels of a molecular transporter that takes up vitamin C, and therefore may not be as susceptible to the treatment. [emphasis mine]