On an unrelated topic, apparently highly refined foods cause weight gain. Aside from the fact that nutrition, metabolism, and related things are wildly complex, and the rest of the stuff in the article, which of these diets sounds better to you:

Participants were randomly assigned to one of two diets for two-week stretches: One group was fed an unprocessed diet full of whole or minimally processed foods like stir-fried beef with vegetables, basmati rice and orange slices. The other group ate an ultra-processed diet of meals like chicken salad made with canned chicken, jarred mayonnaise and relish on white bread, served with canned peaches in heavy syrup. When the two weeks were up, the groups were then assigned to the opposite diet plan.