The article is worth skimming, or at least the abstract
They didn't rely on the participants' subjective perception of time passing, but manipulated it through means that can't possibly be downstream of the subjects' blood sugar.
Participants’ perception of time was manipulated by having them refer to clocks that were either accurate or altered to run fast or slow
Comments
What if perceived time is actually following blood sugar levels, and not the other way around?
The article is worth skimming, or at least the abstract
They didn't rely on the participants' subjective perception of time passing, but manipulated it through means that can't possibly be downstream of the subjects' blood sugar.