This is another case of correlation != causation. The lifestyles that people choose to lead can heavily affect their dietary choices. A sedentary couch lord is

This is another case of correlation != causation. The lifestyles that people choose to lead can heavily affect their dietary choices. A sedentary couch lord is more likely to binge on pizza than a daily bike commuter, perhaps. This is why nutritional studies in the past need to be taken with a grain of salt. We all know from studies that too much red meat can have deleterious consequences on your health. But what we don't know is what type of lifestyles these participants led. Did they also eat junk food while rapaciously devouring heaps of sugar and soda on the side? We're not working in a strict lab environment here so there are lots of variables that we can't possibly account for.