Cited by 124Vitamin C and Antioxidants ResearchComplementary and Alternative Medicine StudiesAntioxidant Activity and Oxidative Stress

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Intravenous Vitamin C and Cancer: A Systematic Review

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Fritz, Heidi, Flower, Gillian, Weeks, Laura, Cooley, Kieran, Callachan, Michael, McGowan, Jessie, Skidmore, Becky, Kirchner, Leesa, Seely, Dugald·2014·Integrative Cancer Therapies

DOI 10.1177/1534735414534463

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Abstract

Background. Intravenous vitamin C (IVC) is a contentious adjunctive cancer therapy, widely used in naturopathic and integrative oncology settings. We conducted a systematic review of human interventional and observational studies assessing IVC for use in cancer patients. Methods. We searched MEDLINE, EMBASE, The Cochrane Library, CINAHL, and AMED from inception to April 2013 for human studies examining the safety, effectiveness, or pharmacokinetics of IVC use in cancer patients. Results. Of 897 records, a total of 39 reports of 37 studies were included: 2 randomized controlled trials (RCTs), 15 uncontrolled trials, 6 observational studies, and 14 case reports. IVC dosing ranged from 1 g to more than 200 g ascorbic acid per infusion, typically administered 2 to 3 times weekly. IVC does not appear to increase toxicity or interfere with antitumor effects of gemcitabine/erlotinib therapy or paclitaxel and carboplatin. Based on 1 RCT and data from uncontrolled human trials, IVC may improve time to relapse and possibly enhance reductions in tumor mass and improve survival in combination with chemotherapy. IVC may improve quality of life, physical function, and toxicities associated with chemotherapy, including fatigue, nausea, insomnia, constipation, and depression. Case reports document several instances of tumor regression and long-term disease-free survival associated with use of IVC. Conclusion. There is limited high-quality clinical evidence on the safety and effectiveness of IVC. The existing evidence is preliminary and cannot be considered conclusive but is suggestive of a good safety profile and potentially important antitumor activity; however, more rigorous evidence is needed to conclusively demonstrate these effects. IVC may improve the quality of life and symptom severity of patients with cancer, and several cases of cancer remission have been reported. Well-designed, controlled studies of IVC therapy are needed.

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Authors: Fritz, H., Flower, G., Weeks, L., Cooley, K., Callachan, M., McGowan, J., Skidmore, B., Kirchner, L., & Seely, D.
Affiliations: Canadian College of Naturopathic Medicine (CA)
Ottawa Integrative Cancer Centre, Ottawa, Ontario, Canada
Carp Ridge Natural Health Clinic, Carp, Ontario, Canada
ORCID: Cooley, Kieran
McGowan, Jessie
Skidmore, Becky
Seely, Dugald
Venue: Integrative Cancer Therapies
Publisher: SAGE Publications
Published: 2014-05-26
Volume: 13
Issue: 4
Pages: 280-300
ISSN: 1534-7354 (ISSN-L)
1552-695X
DOI: 10.1177/1534735414534463
OpenAlex: W2100763849
Cited by: 124
References: 111
Citations by year: 2026: 7 · 2025: 5 · 2024: 6 · 2023: 9 · 2022: 15 · 2021: 15 · 2020: 12 · 2019: 15 · 2018: 13 · 2017: 8 · 2016: 8 · 2015: 9 · 2014: 1
FWCI: 8.07
Type: journal article
Language: en
Open access: gold
doi.org
Licence: journals.sagepub.com/page/policies/text-and-data-mining-license (tdm)
Locations: Integrative Cancer Therapies (publishedVersion)
PubMed (publishedVersion)
Topics: Health Sciences › Nursing › Nutrition and Dietetics › Vitamin C and Antioxidants Research
Health Sciences › Medicine › Complementary and alternative medicine › Complementary and Alternative Medicine Studies
Health Sciences › Medicine › Biochemistry (medical) › Antioxidant Activity and Oxidative Stress
Keywords: intravenous vitamin C, vitamin C, cancer therapy, adjunctive therapy, integrative oncology, naturopathy, chemotherapy toxicity, tumor regression, quality of life, safety profile, anticancer activity
MeSH terms: Antineoplastic Combined Chemotherapy Protocols, Ascorbic Acid, Humans, Infusions, Intravenous, Neoplasms, Quality of Life, Survival Rate

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Intravenous Vitamin C and Cancer: A Systematic Review

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