If most people in the developed world have excess fat storage, why do our bodies signal hunger after only a few hours after eating?
In: Biology
Evolution takes place over many many generations (think hundreds of thousands) so things like fundamental changes in biology take place of periods like millions of years.
Humans have only really been able to enjoy reliable food access for maybe 5 generations if you live in a Western country? So even for the most advanced economy today, we’re talking in the region of a few hundred years at MOST.
We are designed to take in food fairly quickly when available to build up stores in body fat. And because we have big brains, it takes a lot of energy to maintain it. Nearly 20% of our base energy use and therefore food consumption goes towards keeping our brains working. (and yes our brains keep working even when we sleep)
Latest Answers