I used to bash CICO as being an over-simplification until I actually looked at the numbers. The average american eats 3600 calories per day. Fat ones eat more;

I used to bash CICO as being an over-simplification until I actually looked at the numbers. The average american eats 3600 calories per day. Fat ones eat more; perhaps 4000 to 8000. This is far beyond amounts recommended to lose weight effectively: 1500 or less. There are lots of variables in human nutrition and metabolism, but the biggest by far is the fact that people are eating 3-5x the amount of food they should.