Comment by KronisLV

> what happens once you reach 4650 calories?

Well, we probably need to look at the direct quote again.

> There seems to be a hard limit on how many calories our bodies can burn per day, set by how fast we can digest food and turn it into energy.

Maybe i'm reading this wrong, but if one's body were to burn calories at 100% of this supposed possible rate, then by the time you'd reach 4650, a new day would start.

If digestion would top out at 4650 calories at day, with 24 hours per day, it would come down to 193.75 calories per hour. Or, in other words, it'd be about 3.23 calories per minute.