Sounds like burnout, he had mentioned that being something in his history when he did some work with my team a few years back. Burnout is real, it's also probably not glucose depletion triggered seizures, but I think his internal diagnosis says enough.

In general people need to be better aware that you do have real limits to what kind of stress levels you can handle effectively and you need to back off when you start feeling overwhelmed and not try to "push through".