mike wrote: how about added sugars and high fructose corn syrup? While I believe low carb is important, I think sugar and fructose will turn out to be the worse problem.
Agree on sugar being far more important than other carbs especially if you don't have confirmed insulin resistance.
Until his early 40s my dad was a patissier specializing in chocolate breads, sugar roses and marzipan figurines after which he switched to being a chef in a care home. He has always loved and eaten sweet foods, including at breakfast but he simply doesn't eat much overall. He barely has any fat on his body. It's not a decision... just a habit. My mother however is an alcoholic (drinks up to two bottles of wine a day in bad times and because of this she is also less slim than she used to be) so she's ruining every chance she has - but so far at 73 even she has zero cognitive decline. My dad has no education. My mother does, and keeps her brain active when sober (which would be funny if it weren't sad )
I'm awaiting my parents' APOE data (they agreed to test) and assume they're both heterozygous or we would almost need to have AD in the family. I will update within a couple of weeks when I have the results.
Maybe it's luck, maybe it's the life-long lean bodies and exercise, maybe it's some compensating genetic factor... quite possibly a combination.