If you keep up with colon cancer news, you've probably heard a lot about calcium and vitamin D with respect to colorectal cancer. They help prevent polyps. No they don't. Oh wait, yes they do. They don't? No, they do. There's been a lot of research and a lot of disagreement, which of course, has led to more research.
A study published in the American Journal of Epidemiology put a new spin on it, adding retinol (an animal form of vitamin A) to the mix and only looking at polyp formation in the rectum and the part of the colon closest to the rectum.
Results of the Study
Calcium didn't do much and vitamin D didn't do much, but a certain combo was able to reduce the risk of developing polyps -- a high vitamin D intake combined with a low retinol intake. This study isn't likely to impact your daily life, but it's something to consider if you're trying to figure out how to reduce your colon cancer risk. If you think some dietary changes might be in order, talking to your doctor is a good place to start.Related Research Summaries:
- Preventing Polyps with Calcium
- Study Says Calcium Supplements Don't Reduce Colorectal Cancer Risk
- Milk Does a Colon Good
Source: Oh, K. and Willett, W. "Calcium and Vitamin D Intakes in Relation to Risk of Distal Colorectal Adenoma in Women." American Journal of Epidemiology Published online ahead of print 22 Mar. 2007. Accessed 24 Mar. 2007.