Yes. An article published in Lancet 2010 revealed aspirin (75 mg or more) a day decreases your risk of some types of colon cancer. This article combined results of four studies totaling 14,000+ patients. The caveats are that
- aspirin must be taken daily for more than 5 years.
- aspirin decreased proximal (or right-sided) colon cancer by 70%.
- aspirin significantly decreases the risk of rectal cancer.
- doses of aspirin greater than 75 mg a day were not shown to decrease colon cancer more than 75 mg a day.
Hope this helps.