Question

Vitamins

Can vitamins help prevent certain cancers?

A Answers (3)

  • AMitchell L. Gaynor, MD, Oncology, answered
    You need a well-balanced diet in order to prevent cancer, and if you aren’t getting enough nutrients from your whole food intake, you may need to supplement your diet with vitamins and minerals. Vitamins play an important role in maintaining your health through boosting immunity, preventing free radical damage to cells, and upregulating the expression of genes involved in preventing cancer. The following vitamins have been shown to be effective in cancer prevention:
    • Vitamin B6 -- pancreatic cancer, colorectal cancer
    • Vitamin C -- various chronic diseases including cancer, helps repair of damaged DNA in prostatic cancer cells
    • Vitamin D -- melanoma
    • Vitamine E -- bladder cancer, prostate cancer
    • Vitamin K -- Vitamin K2 is a pro-apoptic nutrient that helps cancer cells regain the ability to die normally instead of dividing uncontrollably.

    Adapted from The Gene Therapy Plan by Mitchell L. Gaynor, M.D., published on April 21, 2015 by Viking, an imprint of Penguin Publishing Group, a division of Penguin Random House LLC. Copyright by Mitchell L. Gaynor, M.D., 2015.
  • Experiments with vitamin supplementation have illustrated the dangers of excessive vitamin intake and shown that supplements are generally ineffective for preventing deaths or disease due to major chronic diseases. In several clinical trials, participants who took elevated amounts of beta-carotene, vitamin E and vitamin A actually had a higher risk of cancer and higher mortality than a control group. 

    One study tested the effect of daily doses of beta-carotene (30 mg) and retinyl palmitate (25,000 IU) on cancer incidence in 18,314 participants at high risk of lung cancer because of a history of smoking or asbestos exposure. This multi-center trial began in 1985 and was halted in January 1996, 21 months ahead of schedule. It was stopped because of a clear link between vitamin intake and cancer incidence and mortality. Participants who took the vitamins had a 28% higher lung cancer incidence, 17% more deaths overall and a higher rate of heart disease deaths than those who took a placebo.
  • AAndrea Pennington, MD, Integrative Medicine, answered
    The protective effects of vitamins for fighting cancer appear to depend on a cooperative effort between them and other nutrients found diets rich in fresh fruits and vegetables. Vitamin E may be beneficial for the prevention and treatment of specific cancers, including prostate, oral, stomach, and throat cancers. One study reported that people with the lowest blood levels of vitamin E are at higher risk for all types of cancer than those with the highest levels. Some studies have suggested that certain vitamin D compounds may inhibit prostate cancer cells from proliferating.
Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.
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