Ultra-processed foods are energy-dense and ready-to-eat food items including things like processed breakfast meats, packaged snacks, and ice cream as well as artificially sweetened drinks.
I mean, I’m sure there’s even a correlation between distance from the equator, eating preserved foods, and seasonal depression. Also the correlation between processed food availability, and the cost of those items relative to the country’s economics and food availability (eg. I live in Vietnam, and fresh food is cheaper than processed, and we have low depression relative to the west, for many more reasons than breakfast meats)
I mean, I’m sure there’s even a correlation between distance from the equator, eating preserved foods, and seasonal depression. Also the correlation between processed food availability, and the cost of those items relative to the country’s economics and food availability (eg. I live in Vietnam, and fresh food is cheaper than processed, and we have low depression relative to the west, for many more reasons than breakfast meats)