People are bad at estimating calories, but our bodies are really good at regulating them, if you feed it properly. The low fat diet advice has done horrendous t

People are bad at estimating calories, but our bodies are really good at regulating them, if you feed it properly. The low fat diet advice has done horrendous things to people's metabolisms, leaving people insulin and leptin resistant. The insulin resistance disregulates the flow of fat through adipose membranes, favoring storage; the leptin resistance disregulates the appetite homeostasis that should regulate appetite, hunger, and weight. It can all be tracked back to the disproven diet heart hypothesis, and the fear of fat that ensued (and became enshrined like a religion).