Causality is never so obvious: When you are thinking hard you use more electrolytes. Deplete too many electrolytes in your brain too quickly and risk causing a

Causality is never so obvious: When you are thinking hard you use more electrolytes. Deplete too many electrolytes in your brain too quickly and risk causing a stroke. Strokes may cause and are at least known to exacerbate dementia. (Calories are a bad metric. There's so much chemical complexity they intentionally avoid. Not all "calories" are spent the same way, especially when you are talking about brain chemistry. Optimizing for how much heat a brain generates is directly optimizing for the wrong thing because when the brain is literally smoking, that is a stroke and it is dying.)