In 2016, researchers from the MD Anderson Cancer Center in Houston, Texas, compared thousands of lung cancer patients to those without lung cancer. While looking into their diets, they pinpointed high-glycemic foods–ones that are starchy and sugary, such as bagels. Those who frequently ate high-glycemic foods were 49% more likely to develop lung cancer. Although the study included non-smokers, it did not take into account other conditions such as diabetes, hypertension, or heart disease. One of the researchers, Dr. Xifeng Wu, added that smoking is still more harmful than carbs. If there’s a takeaway, it’s this: diet has little impact on lung cancer as a whole.