This is a big sub-category of obesity is probably, like a lot of these other sub-sections, too big to really do more than scratch the surface on, but I just saw this scary study .
Basically they calculated (somehow) the number of cancercases that could be prevented if Americans weighed less. Most striking:
Endometrium – 49 percent or 20,700
I looked at this on another site and it said it’s especially true for women 20s-45.
So weird that people in some countries die from not enough food and people in some other countries die from too much.