It hides the disease. Better memories aren’t always good news if you’re a woman at risk for Alzheimer’s.
Research from McGill University shows that strong verbal memory acts as a mask. Women can score “normal” on standard cognitive tests long after their brains show signs of the condition. Men with the same damage? They fail the test much sooner.
Ralph Martins at Edith Cowan University calls this a massive problem in the field. We’re only now realizing gender differences aren’t just footnotes—they change the whole clinical picture.
The Test Flaws Out
Sasha Novozhilova and her team looked at two long-term studies in the US and Canada. They tracked older adults. Did memory tests. Did brain imaging.
The standard test is brutal in its simplicity. Listen to 15 words. Remember them immediately. Remember them later, after distractions.
It’s the baseline for suspicion. And for women, it’s failing.
Women kept passing. Their test scores stayed in the “healthy” range for an average of 2.7 years longer than men who had identical levels of amyloid pathology.
Same clumps of misfolded protein in the brain. Same disease stage. Different results.
Why?
Baseline ability. Women generally have better verbal memory throughout their lives. They possess more “cognitive reserve.”
“Females seem to have better connectivity… if one part starts to deterioriate, there are lots of connections… that can help maintain normal cognition.”
Think of it as backup generators. When one circuit blows, others take over. The lights stay on.
When the Reserve Runs Dry
Here is the trap.
Once that reserve is exhausted, the crash is hard.
Louis Collins at McGill puts it plainly: cognition drops quickly. By the time the standard test picks it up, the damage is extensive.
This matters for treatment. Drugs like lecanemab don’t cure Alzheimer’s. They just slow it. Slightly.
They only work if started early.
Women are likely entering clinical trials later because the disease was hiding. That could explain why these new drugs haven’t worked as well for them. The window of opportunity has already slipped shut.
So we have a dilemma. Do we accept the rapid decline? Or do we change the rules?
Rewiring the Screen
Novozhilova argues we need different thresholds for women. A score of 13 out of 15 might be normal for a man, but concerning for a woman whose baseline should be higher.
It’s an adjustment of expectations.
Alternatively, forget the word tests for now.
Martins suggests blood tests. They can spot the disease before memory goes. Screen everyone over a certain age. No words needed. Just chemistry.
And if you catch it? You don’t have to sit idle.
Exercise helps. Brain training helps. The MIND diet helps. These non-drug interventions buy time.
But why do we remember differently?
Evolution. Or so the theory goes. Women needed to talk, bond, and pass knowledge to children. Men tracked game. Modern jobs like editing and teaching might have sharpened that edge further for women.
It’s not just biology. It’s history written in neurons.
The question isn’t really about who is smarter.
It’s about who gets found first. And right now, the test is rigged against half the population.
