Looking at mortality rates in the general population broken down by BMI gives a poor guide to the effects of dietary energy restriction—since many people get thin through being sick or malnourished.
A fairly typical study on the topic:
“How Much Should We Eat? The Association Between Energy Intake and Mortality in a 36-Year Follow-Up Study of Japanese-American Men”
Looking at mortality rates in the general population broken down by BMI gives a poor guide to the effects of dietary energy restriction—since many people get thin through being sick or malnourished.
A fairly typical study on the topic:
“How Much Should We Eat? The Association Between Energy Intake and Mortality in a 36-Year Follow-Up Study of Japanese-American Men”
http://biomed.gerontologyjournals.org/cgi/content/full/59/8/B789