Take it a step further. Does our blood sugar affect the rate at which clocks advance? Because, according to the (rather digestible) article, that was the controlled variable.

That doesn't sound impossible. Like a CPU running slower when the power is janky, there's something appealing to the thought that we experience the passage of time differently based on internal physical processes. There's the trope of "time standing still" when some intense experience is happening - perhaps flooding the system with adrenaline has the opposite effect and speeds up perceived time?

That was my first thought.