Jack Kruse would say over exposure to blue light from devices and not enough natural light exposure. A screwed up circadian rhythm has all sort of downstream effects that lead to weight gain among other things.

Seed oils started to find their way into the food in the 50’s-70’s more or less, but that’s also when TVs became popular and Vegas (neon bulbs) became a thing.

Both an issue. If you eat too much seed oils then you can’t be in the sun as long cause you will burn

Solution: eat steaks outside