Study: Vitamin D fights colorectal cancer
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A new meta-analysis suggests that taking vitamin D supplements can cut risk of colorectal cancer.
The analysis conducted by Mathilde Touvier of Imperial College London and colleagues found an inverse association between vitamin D and risk of colorectal cancer.
The researchers searched studies on vitamin d and colorectal cancer published prior to 2010 in the medical database Pubmed. Only original, peer-reviewed studies were included in the analysis.
Ten studies showed that each additional 100 IU of dietary vitamin D per day within the range of 39 to 719 IU per day was associated with a 5 percent reduction in the risk of colorectal cancer.
Six studies showed each additional 100 IU of serum vitamin D per liter within the range of 200 to 1800 IU/L was associated with 4 percent reduced risk of colorectal cancer.
Supplementation of vitamin D at the range of 0 to 600 IU per day, total vitamin D intake ranging 79 to 732 IU per day and 25-hydroxyvitamin D status were inversely associated with colon cancer risk.
The findings published in the March 4, 2011 issue of Cancer Epidemiology, Biomarkers & Prevention suggest that vitamin D protects against colorectal cancer.
A recent study led by two veteran vitamin D researchers suggests one needs to take 4000 to 8000 IU of vitamin per day to have a protection against cancer.
David Liu, Ph.D.
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