Including more fiber and yogurt in your diet may reduce the risk of lung cancer, suggests an observational study in JAMA Oncology. It pooled data from 10 cohort studies involving more than 1.4 million adults in the U.S., Europe, and Asia, of whom about 18,800 developed lung cancer.
After adjusting for factors known to affect lung cancer risk, including age and smoking, the researchers found that people who consumed the most dietary fiber (about 31 grams a day for men, 28 for women, on average) had a 17 percent lower risk of developing lung cancer over a follow-up of 8½ years, compared to those who consumed the least fiber (about 10 grams a day). Those with high intakes of yogurt (about 3 ounces a day for men, 4 ounces for women, on average) were 19 percent less likely to develop lung cancer than non-yogurt-eaters.
And eating the largest amounts of both fiber and yogurt was linked to a more than 30 percent reduction in risk, suggesting a potentially synergistic effect. Some earlier research has linked dietary fiber to a lower risk of chronic obstructive pulmonary disease (COPD).
This article first appeared in the UC Berkeley Wellness Letter.