It was a good week for biohacking results, with a visible change around my tum-tum; I'm slowly but surely getting something akin to "definition" there, albeit definition of a brilliantly round little beer-belly. So when it came to cheat-day, I thought I would go all out: pizza, donuts, even a Big Mac for lunch.

I woke up Sunday morning feeling hungover, despite not having had any alcohol! Sugar-hangover, perhaps, and reason enough to read up on the "damage control" chapter of the 4HB.