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Findings Link Diet Soda With Reduced Risk of Colon Cancer Recurrence

A daily dose of diet soda may help protect survivors of colon cancer from disease recurrence and death.
BY Beth Fand Incollingo
PUBLISHED February 22, 2019
A daily dose of diet soda may help protect survivors of colon cancer from disease recurrence and death.

Survivors of stage 3 colon cancer undergoing chemotherapy after sur­gery benefited from drinking artificially sweetened beverages, according to study results published in July 2018. Those who drank at least one 12-ounce serving a day had roughly half the risk of cancer recurrence or death compared with survivors who usually didn’t drink these beverag­es. Increased intake of artificially sweetened drinks was also associated with a statistically significant improvement in length of life.

Furthermore, replacing a daily 12-ounce serving of a sugary drink with an artificially sweetened one was associated with a 23 percent lower risk of cancer recurrence and mortality, Brendan J. Guercio, M.D., and col­leagues, reported in a paper in the journal PLOS ONE.

The study authors explored the potential connection between arti­ficially sweetened drinks and better health outcomes because they knew from previous findings that having an excess energy balance — related to, for instance, a sedentary lifestyle, diabetes or high intake of sugar-sweetened beverages — is associated with increased colon cancer recurrence and mortality. “We hypothesized that artificially sweetened beverage intake might reduce colon cancer recurrence by substituting for, and thereby reduc­ing, intake of high-calorie, sugar-sweetened alternatives,” they wrote.

The 1,108 survivors in the study reported their dietary and lifestyle habits, including intake of artificially sweetened beverages, by question­naire four months into chemother­apy treatment and six months after completing therapy. The findings of a benefit associated with artificial­ly sweetened beverages persisted even after researchers adjusted for factors that could affect the results, such as body mass index, physical activity, following Western eating patterns and dietary glycemic load, they wrote. Glycemic load refers to the amount a particular food raises the glucose level in a person’s blood; sugars and other carbohydrates tend to increase this number.

The scientists suggested that consumption of both categories of beverages should also be studied in people who have not developed colon cancer.

“Given the likelihood that individuals who consume artificially sweetened beverages following cancer diagnosis also consumed artificially sweetened beverages prior to cancer diagnosis, we can­not exclude the possibility that individuals who consume artificially sweetened beverages develop biologically less aggressive colon cancer tumors,” they wrote. “Future studies should examine artifi­cially sweetened beverage intake both before and after colon can­cer diagnosis in order to further elucidate the relationship between artificially sweetened beverage intake and colon cancer recurrence and mortality.”

Diet soda’s affect on initial colon cancer risk should be studied next, scientists say.
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