Yet another recent study shows that people with better (lower) blood glucose levels have a better memory and fewer signs of brain damage:
As usual, these are only statistical associations, and not evidence that blood sugar affects memory. However, more and more data suggest that high blood sugar levels risk causing long-term damage to the brain.
I just checked my blood sugar, an hour after an LCHF breakfast (eggs fried in butter, roast beef, coffee with cream). It was 99 mg/dl (5.5 mmol/l) – excellent.