Episode summary
Cognitive Decline Expert: The Disease That Starts in Your 30s but Kills You in Your 70s
The Diary of a CEO
· · 2 hr 5 min · Hosts: Steven Bartlett · Guests: Louisa Nicola
Summary
Louisa Nicola argues that Alzheimer’s is far more preventable than most people think, and that the disease process can begin in midlife long before symptoms appear in a person’s 60s or 70s. She says women face disproportionate risk, with menopause and declining estrogen creating a brain-energy crisis that can show up as fog, sleep disruption, and faster cognitive decline. She also says 95% of current cases could have been prevented through lifestyle rather than genetics alone.
A large part of her case centers on exercise as brain medicine. She says resistance training, especially heavy lifting and strong legs, builds cognitive reserve, increases brain-derived growth factors, and may help with cancer risk and brain aging. She also pushes zone 5 cardio and VO2 max work over a pure zone 2 focus, arguing that higher-intensity training does more for the brain and heart, and citing a study in which four hours of exercise a week reversed the age-related effects of the heart by 20 years.
Nicola also stresses sleep, blood pressure control, and sedentary behavior. She says one night of sleep deprivation raises amyloid beta risk, prolonged sitting is itself harmful, and high blood pressure damages the blood-brain barrier and capillaries. Her practical advice includes regular blood pressure monitoring, breaking up sitting with air squats, and protecting deep sleep as a core Alzheimer’s-prevention tool.
Key takeaways
- Louisa Nicola says Alzheimer’s generally starts in the 30s, even though symptoms usually surface decades later.
- Nicola argues that 95% of Alzheimer’s cases could have been prevented and that being a woman is itself a major risk factor.
- She says heavy resistance training and strong legs are among the best tools for building cognitive reserve and protecting the brain.
- Nicola says women in menopause face a roughly 30% reduction in brain glucose metabolism and may benefit from a ketogenic approach.
- She argues that zone 5 intervals and VO2 max work are more valuable for brain and heart health than staying mostly in zone 2.
Notable quotes
“Alzheimer's disease is a disease of midlife. And so it generally starts in our 30s”
“95% of it could have been prevented”
“The more cognitive reserve that you have, the more cognitive capacity that you have been training year on and year out will save you at 60 from harmful insults”
“having strong legs is by far the most important tool in your toolbox for the prevention of Alzheimer's disease”
“The brain loves ketones and it actually utilizes them more effectively than glucose”
How the episode opens
And we have this white powder in front of me. You got a big smile on your face.
I do because I don't care who you are, you should definitely be having this. Let's talk about creatine. Phenomenal research shows you can creatine your way out of sleep deprivation.
It can protect your brain against a concussion, stroke, from stress. And there was a study done on Alzheimer's disease patients. And they found that patients not only preserved their cognitive functions, but they had more energy and they were able to exercise more.
And I know this because I'm a clinician and over the last decade I've been surrounded by the greatest neurosurgeons in the world studying the brain. And so I'm here to tackle one disease and that is Alzheimer's because it generally starts in our 30s and 60 million people worldwide have Alzheimer's. 70% being women.
And I get angry and I get passionate because women have been lied to. They've been underrepresented. They downplay their symptoms or they're too scared to ask their doctor for advice.
And what people don't really know is that it is a preventable disease, but it's like endstage cancer. Once you get the diagnosis, there is no cure. And the fact that so many people are at the mercy of a disease that is preventable is not okay with me.
And I don't think people understand these things. Like people don't really know that we're becoming more sedentary, which is a disease. And there was a study that was done on this that showed that if you do 10 air squats every hour, this can compensate for your sedentary lifestyle.
And then we have several lifestyle factors that can lower your risk of getting Alzheimer's disease, as well as showing you what 5 minutes a day can do for your brain performance.
From the episode’s captions: roughly the first two minutes, lightly cleaned. Keep watching on YouTube →
Topics
- alzheimer’s prevention
- creatine and brain energy
- deep sleep and cognition
- exercise for brain health
- hormone replacement therapy and menopause
Companies and tickers mentioned
- Neuro Athletics
Watch the episode
Summary, takeaways and quote selection by Octagon. Quotes are short excerpts; the full conversation is in the episode.
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