[oezi]

https://www.science.org/doi/10.1126/sciadv.aaw0341

"Incorporating data from overfeeding studies, we find evidence for an alimentary energy supply limit in humans of ~2.5× BMR"

A good book the topic is Herman Ponzer's "Burn"

The main issue seems the surface area of the GI tract.

[petesergeant]

Fascinating, thank you. Apparently this means the most I can gain over Xmas week is 2.45kg, which is reassuring.