The implication is mostly straightforward in abstract: the body has a limited ability to manage blood sugar, and when it's imbalanced other symptoms develop. In

The implication is mostly straightforward in abstract: the body has a limited ability to manage blood sugar, and when it's imbalanced other symptoms develop. In the short term this may just mean finishing a meal and being unable to focus for the next hour, longer term it might develop into something more impactful like diabetes. The specific pathways of this response and how they lead to specific symptoms are what isn't known by the science. But it's analogous to most everything else about the body: we can't concentrate a lot of strong signals like temperature changes or physical exertion into a short timeframe and expect to stay in homeostasis. If you overdo it, that's when the problems start.