[anon84873628]

Let's take a pound of fat as 3500 calories. To gain one pound in a year is an average of 9.59 excess calories per day. Or about 0.5% of the typical total daily intake.

Yeah, managing a system within 0.5% is subtle.

Especially when biologically and psychologically the pressure is towards over consuming rather than under. If you consistently eat a deficit you will very obviously feel hungry. If you consistently eat a small excess the effects that would lead you to regulate are much more... subtle.

[mathgradthrow]

Meanwhile, tracking consumption involves error bars that span a factor of 2. Go figure out how many calories are in an avocado. Is that per gram figure amortized for the weight of the pit, or is this just for the flesh?

Counting calories precisely was invented by the processed food industry.

[throwaway173738]

10 calories a day is like the BMR difference between 20 and 30.