A new study suggests that intense mental work may result in the accumulation of potentially toxic metabolites in the prefrontal cortex, subsequently leading to cognitive fatigue.
After you read this article, please read my article about ego depletion/fatigue. It will make a lot of sense.

“The researchers hypothesized that cognitive fatigue would deter participants from opting for these high cost options and cause them to choose rewards that need less cognitive effort and provide immediate gratification.”
MedicalNewsToay
