Reducing Colorectal Cancer Risk with B-Vitamins and Supplements
Author Information
Author(s): Bruce W R, Cirocco M, Giacca A, Kim Y-I, Marcon N, Minkin S
Primary Institution: University of Toronto
Hypothesis
Can dietary supplements of folic acid, n-3 fatty acids, and calcium reduce colorectal cancer risk markers associated with B-vitamin deficiency, insulin resistance, and colonic inflammation?
Conclusion
The study found that while the dietary supplements modestly affected some biomarkers, they did not significantly reduce markers associated with colonic inflammation.
Supporting Evidence
- The intervention increased folate levels significantly in the treatment group.
- Homocysteine levels decreased in the treatment group compared to the control group.
- The study demonstrated the feasibility of using biochemical markers as endpoints in cancer prevention trials.
Takeaway
This study tested if taking certain vitamins could help lower the risk of colon cancer, but it didn't work as well as hoped.
Methodology
The study was a randomized controlled trial with 98 participants who took either supplements or placebos for 28 days, with blood and fecal samples analyzed before and after the intervention.
Potential Biases
Potential biases may arise from participant selection and the reliance on self-reported dietary habits.
Limitations
The study was limited by its short duration and the modest effects observed on biomarkers.
Participant Demographics
Participants were patients with a history of colonic polyps or intramucosal carcinomas, with a mean age of 61.4 years, including 67 males and 31 females.
Statistical Information
P-Value
p=2 × 10−6 for folate increase
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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