The Tamsen Show
Episode: The Menopause Brain: Top Neuroscientist Shares New Data on Brain Fog and Alzheimer's
Host: Tamsen Fadal
Guest: Dr. Lisa Mosconi
Date: August 27, 2025
Episode Overview
This episode features a groundbreaking conversation between Tamsen Fadal and Dr. Lisa Mosconi, a leading neuroscientist and Director of the Women’s Brain Initiative at Weill Cornell Medicine. Dr. Mosconi reveals new research on the neurological underpinnings of menopause, the link between brain fog and Alzheimer’s, and shares exclusive insights from the largest global study ever undertaken on women’s risk of Alzheimer’s. The episode offers both hope and clarity for women navigating perimenopause, menopause, and concerns over cognitive health.
Main Themes
- Menopause as a Neurological Event: Not just hormonal—menopause is fundamentally a transition for the female brain.
- Alzheimer’s Disease and Gender: Women are disproportionately affected by Alzheimer’s, with new data redefining when risk accumulates and how menopause fits into the picture.
- Validating Women’s Experience: Why brain fog and cognitive changes during menopause are both real and measurable.
- Hormone Therapy and Prevention: The nuanced relationship between hormone therapy, timing, and cognitive protection.
- Diet, Lifestyle, and Brain Health: Practical, science-backed advice on eating and living to protect the brain.
- The CARE Initiative: Dr. Mosconi announces the world’s largest menopause-brain study and how women can participate.
Key Discussion Points and Insights
Dr. Mosconi’s Origin Story & Motivation
[04:07 – 08:55]
- Raised in Florentine family of nuclear physicists, Dr. Mosconi grew up discussing brains, physics, and medical imaging.
- Personal tragedy: Multiple female relatives, including her grandmother and two great-aunts, developed Alzheimer’s, while their brother did not.
- This family pattern motivated her to investigate sex differences in Alzheimer’s risk.
Quote:
"My grandmother... started showing signs of cognitive decline, which then turned into a diagnosis of Alzheimer's... her two younger sisters also developed Alzheimer's... whereas their brother did not. That was shocking and heartbreaking... but it was also really frightening."
— Dr. Lisa Mosconi [06:01]
Sex Differences in Alzheimer’s Risk
[08:55 – 11:18]
- Being a woman is the second-strongest risk factor for Alzheimer’s after age (ratio: two women to one man).
- Previous explanations that women simply live longer are insufficient; women do not show higher rates of other age-related dementias.
- Research on sex-specific differences is only now beginning.
Quote:
"It's Alzheimer's disease that seems to be more specifically an issue for women than for men... the ratio is two to one. For every man suffering from Alzheimer's, there are two women."
— Dr. Lisa Mosconi [10:13]
Rethinking When Alzheimer’s Begins
[11:18 – 15:43]
- Common myth: Alzheimer’s is a disease of old age.
- New insight: Pathology starts building decades earlier, often in midlife (40s+), though symptoms only appear later when the brain cannot compensate.
Quote:
"Alzheimer's is not a disease of old age, but rather it is a disease of midlife with symptoms that start in old age."
— Dr. Lisa Mosconi [11:18]
The Intersection of Menopause & Brain Health
[15:43 – 22:13]
- Dr. Mosconi’s breakthrough: Using PET scans to compare women’s brains before, during, and after menopause.
- Discovery: Cognitive complaints (“brain fog”) in late perimenopause correlate with measurable drops in brain energy (up to 30% in some regions).
- These changes do not reflect neurological deficits or early dementia but are part of a transition-state.
Quote:
"Women tended to show more red flags for Alzheimer's disease in their brains than men of the same age... nothing would really explain this difference, statistically."
— Dr. Lisa Mosconi [18:01]
Understanding Perimenopause & Brain Fog
[22:13 – 26:42]
- Detailed breakdown of premenopausal, perimenopausal, and postmenopausal brain stages.
- Symptoms like sleep disruption, mood changes, and cognitive “fog” often mark late perimenopause. Up to 62% of women report some cognitive change.
- Distinction: Brain fog is typically "subjective cognitive decline"—not measurable dementia.
Quote:
"For many women... there is a little bit of a dip in cognitive performance and mental acuity, but it's still within normal limits. So it is not a deficit."
— Dr. Lisa Mosconi [25:33]
Differential Diagnosis: Brain Fog vs. Dementia
[26:42 – 31:02]
- Importance of proper diagnosis (considering thyroid issues, infections).
- Example: A woman wrongly diagnosed with mild cognitive impairment actually had a silent UTI, quickly resolved with antibiotics.
- Baseline cognitive testing is critical for tracking changes.
Quote:
"We always recommend getting a good baseline... because then, if things improve, great. If not... we want to compare you to you a couple of years ago."
— Dr. Lisa Mosconi [29:00]
Brain Scans & Recovery Post-Menopause
[31:02 – 39:40]
- PET scans: From premenopause (high brain energy) to perimenopause (moderate drop) to postmenopause (significant drop).
- Energy drop most evident in temporal cortex—memory hub.
- Many women do recover cognitive function after early menopause, typically after 2–6 years. For some, cognition "bounces back" or stabilizes; others may not recover fully, warranting Alzheimer’s prevention focus.
Quote:
"After the final menstrual period, there's still the early postmenopausal phase where the brain is kind of settling down, is trying to adjust. And then for quite a few women, actually, cognition bounces back."
— Dr. Lisa Mosconi [36:32]
Validating Menopause as a Brain Event
[42:27 – 47:06]
- Menopause is a neuroendocrine transition, not just loss of periods or hormones.
- Culturally, menopause is often dismissed or pathologized; Dr. Mosconi advocates recognizing it as a normal transition that justifies support and care.
- Encourages a more compassionate, celebratory view of menopause.
Quote:
"Menopause is a neuroendocrine transition state where your body and your brain are transitioning from your reproductive life to your non reproductive life."
— Dr. Lisa Mosconi [45:32]
Hormonal Sensitivity & Why Experiences Vary
[52:10 – 56:21]
- Emphasizes individual differences in hormonal sensitivity, influencing risk for brain fog, mood disorders, or even Alzheimer’s.
- Brain has high density of estrogen receptors; response varies by individual, affecting who develops symptoms or recovers.
Quote:
"Every woman reacts differently to the same type of hormonal change... there’s a range of response."
— Dr. Lisa Mosconi [54:46]
The Truth About Hormone Therapy and Brain Health
[56:21 – 68:28]
- Historical context of hormone therapy (HT) and Alzheimer’s: Early studies (WHI, 2002) were flawed—wrong type of hormones, started too late (women in their 70s).
- Updated evidence: When started within 10 years after menopause, HT (especially estrogen therapy) may reduce Alzheimer’s risk by 32%.
- Regional differences: Studies from North America show protective effects; some northern European studies do not, possibly due to different hormone regimens.
Quote:
"For women who are using only estrogens and they take it at the right time, within 10 years of the final menstrual period, there is a significant risk reduction for Alzheimer's disease."
— Dr. Lisa Mosconi [64:10]
Diet, Lifestyle, and Brain Health
[70:02 – 74:08]
- A Mediterranean-style diet—rich in whole foods, fruit, vegetables, fish, legumes—supports later onset of menopause and milder symptoms.
- Avoid processed foods, excess refined sugars, and prioritize hydration; alcohol is dehydrating and not brain-friendly.
- "Water is food for the brain." Coffee, soda, filtered/distilled water are not substitutes for nutrient-rich hydration.
Quote:
"Water is essential for every brain functionality, every reaction in the brain to occur. And you don't want to be dehydrated for a number of reasons, including that the brain is sensitive to very mild dehydration."
— Dr. Lisa Mosconi [74:43]
Major New Research: CARE Initiative
[83:11 – 92:09]
- Dr. Mosconi announces the launch of CARE: Cutting Alzheimer’s Risk through Endocrinology, the largest ever women's brain health study.
- $50 million project, 16 global sites, 122 data centers, data from over 30,000 women (incl. 100,000 imaging points), over 20 million clinical records.
- Goals: develop a risk calculator for women, validate hormone & menopause as risk factors, direct biomarker-driven Alzheimer’s prevention.
Quote:
"This is effectively the largest ever global examination of women's risk of Alzheimer's ever attempted."
— Dr. Lisa Mosconi [90:31]
"We need a comprehensive risk assessment for women that we can then translate into a predictive model. What I want is a risk calculator... for Alzheimer's."
— Dr. Lisa Mosconi [96:02]
How Listeners Can Get Involved
[89:55 – 90:15]
- The CARE initiative is actively recruiting women. Visit participating sites like Weill Cornell Medicine for research participation.
Quote:
"We have sites who are actively recruiting participants to become part of research, myself included."
— Dr. Lisa Mosconi [90:00]
Notable Quotes & Memorable Moments
- "Menopause isn't just a hormonal shift. It's a neurological event." — Tamsen Fadal [01:54]
- "Do you see this big red blob? This is the temporal cortex... That's a 30% drop in brain energy levels." — Dr. Lisa Mosconi [32:57]
- "After the final menstrual period... for quite a few women actually, cognition bounces back." — Dr. Lisa Mosconi [36:32]
- "Menopause is a neuroendocrine transition state where your body and your brain are transitioning from your reproductive life to your non reproductive life." — Dr. Lisa Mosconi [45:32]
- "We need to have a comprehensive risk assessment for women... What I want is a risk calculator... for Alzheimer's." — Dr. Lisa Mosconi [96:02]
- "If your body's going through a hard time for whatever reason, if there's any problem, let's help out, right?" — Dr. Lisa Mosconi [49:15]
Useful Timestamps
- [04:07] – Dr. Mosconi’s scientific upbringing and family’s Alzheimer’s history
- [08:55] – How gender affects Alzheimer’s risk
- [15:43] – When Alzheimer’s pathology begins
- [18:01] – First brain scan comparisons: pre-, peri-, and postmenopause
- [22:13] – Symptom timeline and brain fog defined
- [29:00] – Why baseline cognitive tests matter
- [32:57] – Visuals of brain energy drops during menopause
- [36:32] – Do cognition and memory rebound post-menopause?
- [45:32] – The truest definition of menopause
- [64:10] – Hormone therapy timing and impact on Alzheimer’s risk
- [74:43] – Why hydration is vital for brain health
- [83:11] – CARE initiative and its global ambition
- [90:00] – How women can participate in CARE
Actionable Takeaways for Women
- Recognize Brain Fog as Real: Temporary cognitive changes during menopause are validated by science. They’re not early dementia.
- Consider Hormone Therapy Early: Starting estrogen-based hormone therapy within 10 years of menopause may lower Alzheimer’s risk (but needs specialist consultation).
- Focus on Diet and Hydration: Whole foods—especially Mediterranean diets—plus attentive hydration directly support your brain health.
- Track Your Own Cognitive Baseline: Early testing provides a helpful benchmark.
- Participate in Research: Get involved in CARE or local women’s brain studies to help accelerate understanding and prevention.
Further Information
Links to Dr. Mosconi’s brain scans, the CARE research initiative, and study enrollment will be available in the show notes.