Diagnoses and death rates for colorectal cancer have dropped by more than 45 percent since the 1980s in part because of early screening in people aged 50 or older. The question is : Why are rates rising in people aged 20 to 49? Researchers tracked roughly 85,000 women aged 25 to 42 for 14 years. Each 11-pound weight gain after age 18 was linked to a 9 percent of colorectal cancer. Women with obesity had nearly twice the risk of those whose weight was in the lower half of the “healthy” range. What to do: Lose (or don’t gain) extra pounds. Although this kind of study can’t prove that excess weight caused the higher risk of colorectal cancer in these younger women, increasing weight is a well-established risk in older people. Others include type 2 diabetes, too little exercise, and diets high in red and processed meats.
Source: Nutrition Action Health Letter December 2018