The conclusions drawn from that 3-year longitudinal nutrition survey are questionable. There does not appear to be any attempt to correct for seasonal energy ex

The conclusions drawn from that 3-year longitudinal nutrition survey are questionable. There does not appear to be any attempt to correct for seasonal energy expenditure changes. Ideally, you'd like to see some questions regarding activity level by season as well as energy intake. It's a perfectly reasonable alternative hypothesis that men are eating more in the sunnier seasons because they're doing more outdoor work. It's also possible the people answering these surveys are not accurately weighing and logging their meals, as those numbers in all cases are suspiciously low, but that wouldn't necessarily affect the relative changes as long as they're equally wrong in all seasons.