Written based on 5 research studies on PubMed, searched on 2026. nov. 11..
The claim
Posts online say that vitamin C (incl. high-dose) helps with chronic lymphocytic leukaemia.
Where research stands
We found 5 published papers on vitamin C (incl. high-dose) and chronic lymphocytic leukaemia. They were published between 1981 and 2020. 1 of them is a study in people. None of them compared people who got it with a group that did not. None was a study in animals, and 2 were only in cells in the lab.
- 1In people
- 0In animals
- 2Only in the lab
What the studies found
We have not summed up these studies in words yet. The most important papers are listed under Sources.
Verdict
Vitamin C (incl. high-dose) has been studied in people with chronic lymphocytic leukaemia, but not in randomised trials.
What this means for you: A study in people is not proof that it helps you. Do not stop or change your medicines because of it. Ask your doctor before you start taking it.
Sources
- Phase II study of arsenic trioxide and ascorbic acid for relapsed or refractory lymphoid malignancies: a Wisconsin Oncology Network study.2009 · Hematol Oncol · Study in people
- Ascorbic acid (vitamin C) synergistically enhances the therapeutic effect of targeted therapy in chronic lymphocytic leukemia.2020 · J Exp Clin Cancer Res · In the lab
- Arsenic trioxide and ascorbic acid demonstrate promising activity against primary human CLL cells in vitro.2010 · Leuk Res · In the lab
- Fruit and vegetable intake and vitamin C transporter gene (SLC23A2) polymorphisms in chronic lymphocytic leukaemia.2017 · Eur J Nutr · Other paper
- Increased ascorbic acid content in chronic lymphocytic leukemia B lymphocytes.1981 · Proc Natl Acad Sci U S A · Other paper
