Alzheimer's Risk, Sleep, and Breathwork: What Every Woman in Perimenopause Should Know
Alzheimer's Risk, Sleep, and Breathwork: What Every Woman in Perimenopause Should Know
By Leslie Burgie, APRN | Nurse Practitioner · Women's Hormone Health · 9D Breathwork Facilitator
Two thirds of all Alzheimer's diagnoses are in women. This is not explained by the fact that women live longer. Something else is happening — and the evidence increasingly points to the perimenopause transition as a critical window.
The Research That Changed How I Think About Women's Brain Health
In recent years, the work of Dr. Lisa Mosconi, PhD — neuroscientist, director of the Women's Brain Initiative at Weill Cornell Medicine, and author of The Menopause Brain — has fundamentally shifted what we understand about Alzheimer's risk in women.
Dr. Mosconi's brain imaging research has documented something that most physicians still are not discussing with their patients: the perimenopause-to-menopause transition produces measurable, observable changes in brain structure, energy metabolism, and the accumulation of Alzheimer's-associated proteins. These are not subjective symptoms. They appear on imaging.
Her published longitudinal studies found that the perimenopause to menopause transition influences Alzheimer's biomarker progression — including amyloid-beta accumulation, one of the hallmark pathological features of Alzheimer's disease. Her multi-modal neuroimaging research documented substantial differences in brain structure, connectivity, and energy metabolism across perimenopause stages, with effects specific to menopausal endocrine aging rather than simply chronological aging. Age-matched men showed no comparable changes.
What this means practically is that the cognitive symptoms women often experience during perimenopause — brain fog, word retrieval difficulty, memory lapses, difficulty concentrating — are not imaginary. They reflect real changes in brain physiology driven by hormonal transition. And for a subset of women, particularly those carrying the APOE4 gene variant, those changes may create a window of increased Alzheimer's vulnerability.
As Dr. Mosconi has stated publicly: Alzheimer's is not a disease of old age. It's a disease of midlife with symptoms that begin in old age. The changes start decades before diagnosis — and perimenopause may be one of the critical inflection points.
Why Estrogen Matters to the Brain
To understand why perimenopause creates this vulnerability, we need to understand what estrogen does in the brain — which is considerably more than most clinicians appreciate.
Estrogen is neuroprotective. It supports serotonin and dopamine production, maintains the sensitivity of stress receptors, supports mitochondrial function in neurons, helps facilitate clearance of amyloid-beta from the brain, and regulates the inflammatory responses that drive neurodegeneration. The brain has estrogen receptors throughout — this hormone is not peripheral to brain function. It is integral to it.
As estrogen fluctuates and declines during perimenopause, the brain loses some of this protective scaffolding. Brain energy metabolism decreases. Inflammatory processes increase. The mechanisms that clear amyloid-beta become less efficient. And the HPA axis, already under strain from perimenopausal hormonal changes, produces elevated cortisol that further suppresses neuroprotective hormonal activity.
This is the biological context for why sleep disruption during perimenopause is not just uncomfortable. It may be consequential for long-term brain health.
The Glymphatic System: Your Brain's Overnight Cleaning Crew
In 2012, neuroscientists identified what is now called the glymphatic system — a network of channels lining the brain's blood vessels, driven by specialized support cells called astrocytes, that functions as the brain's primary waste clearance system.
Here is how it works: cerebrospinal fluid flows through perivascular channels into brain tissue, exchanges with interstitial fluid through water channels on astrocyte end feet, and carries metabolic waste — including amyloid-beta and tau proteins, both strongly implicated in Alzheimer's disease — out of the brain for clearance by the peripheral lymphatic system.
Think of it as the brain's overnight custodial crew. And it appears to operate most efficiently during sleep.
What sleep deprivation does
Research has documented that glymphatic clearance is significantly amplified during sleep. In animal studies, the interstitial space between brain cells expands by up to 60% during sleep, allowing cerebrospinal fluid to flow more freely and remove waste more efficiently. Deep slow-wave sleep appears particularly important for this process.
A 2026 randomized crossover trial published in Nature Communications provided compelling human evidence: glymphatic clearance during normal sleep increased morning plasma levels of Alzheimer's disease biomarkers compared to a sleep-deprived night — meaning the brain had successfully moved amyloid-beta and tau out of brain tissue and into the bloodstream for clearance. Sleep deprivation reversed this.
One of the most striking findings in this field: even a single night of sleep deprivation in young healthy adults produced measurable increases in amyloid-beta accumulation. Chronic sleep disruption repeated over months and years means the brain's waste removal system is repeatedly compromised — and toxic proteins accumulate.
The perimenopause sleep problem
Perimenopausal women are among the most sleep-disrupted populations in medicine. Night sweats and hot flashes fragment sleep architecture and prevent the sustained periods of deep sleep where glymphatic clearance is most active. Declining progesterone — which acts on GABA receptors and naturally promotes calm and sleep — makes falling and staying asleep harder. Elevated cortisol from HPA axis dysregulation raises nighttime arousal. Anxiety, which is common during hormonal transition, further disrupts sleep onset and maintenance.
The result is that many women are experiencing both hormonal changes that reduce the brain's neuroprotective capacity and chronic sleep disruption that impairs the glymphatic system's ability to clear Alzheimer's-associated waste products — simultaneously, during the same window of biological vulnerability.
The brain fog, word-finding difficulty, and memory concerns that women often dismiss as just stress or just menopause deserve to be taken seriously. They may be early signals of a system under meaningful strain.
A Clinical Note: What We Know and What Is Still Evolving
I want to be direct about the state of the science, as I try to be with all clinical topics. Much of the glymphatic research was initially conducted in animal models. Directly measuring glymphatic activity in living humans is technically difficult. A 2025 scientific debate among leading neuroscientists noted that while the sleep-glymphatic connection is well-supported, some newer evidence suggests clearance may also occur during wakefulness — complicating the picture somewhat.
What we can say with confidence: chronic sleep disruption is strongly and consistently associated with higher accumulation of Alzheimer's-associated proteins and increased dementia risk across multiple lines of research. Whether glymphatic impairment is the primary mechanism or one of several contributing factors remains an area of active investigation. The clinical implication — protect your sleep — is robust regardless of where that scientific debate ultimately lands.
Where Breathwork Enters the Picture
If perimenopause creates a window of hormonal vulnerability and sleep disruption simultaneously, then anything that improves sleep quality and nervous system regulation becomes directly relevant to brain health — not just to wellness.
This is where breathwork enters the conversation with genuine clinical significance.
The vagus nerve and sleep onset
Slow, intentional breathing activates the vagus nerve — the primary highway of the parasympathetic nervous system — and shifts the autonomic nervous system from sympathetic dominance toward the calm, restorative state required for sleep onset and deep sleep maintenance.
Research supports this mechanism specifically:
A 30-day slow-paced breathing intervention study documented significant improvements in subjective sleep quality and cardiac vagal activity — a direct measure of parasympathetic nervous system engagement
Multiple studies confirm that slow breathing at approximately 5-6 breaths per minute improves heart rate variability, reduces cortisol, and reduces the hyperarousal state that underlies perimenopausal insomnia
A 2021 study in Scientific Reports found that a single session of deep and slow breathing produced significant improvements in vagal tone — and notably, the effect was greater in older adults than in younger ones
Intentional breathwork before sleep has been shown to shorten sleep onset latency and reduce nighttime arousal
The clinical logic is direct: by activating the vagus nerve, intentional breathing signals the brainstem to shift out of alert mode. This creates the physiological conditions — lower cortisol, reduced heart rate, reduced sympathetic tone — that allow the transition into deep slow-wave sleep, which is when glymphatic clearance appears most efficient.
9D Breathwork and neural entrainment
Standard breathwork achieves vagal activation through the breath pattern alone. 9D Breathwork layers immersive sound technology — binaural beats, solfeggio frequencies, isochronic tones — beneath the intentional breath. Binaural beats in particular have been studied for their ability to entrain brainwave activity toward lower frequency states, including theta and delta waves, that correspond to deep relaxation and the sleep states in which restorative brain processes occur.
A 9D Breathwork session, particularly in the evening, may therefore support not just relaxation but the neurological transition into the quality of sleep the brain requires for its own maintenance. I want to be appropriately careful: we do not yet have clinical trials specifically studying 9D Breathwork and glymphatic clearance. What we have is a well-established mechanism, a plausible and research-supported hypothesis, and a practice that is safe, accessible, and documented to benefit the perimenopausal nervous system through multiple pathways simultaneously.
What to Do — Practically
If you are in perimenopause or approaching it, here is what the current evidence supports:
Protect deep sleep as a clinical priority
Consistent sleep and wake times, a cool dark room, elimination of alcohol (which suppresses deep sleep architecture), and management of night sweats through appropriate interventions all support the sleep quality the glymphatic system requires. This is not a lifestyle preference — it may be a direct input to long-term brain health.
Address the hormonal drivers of sleep disruption
Perimenopausal sleep disruption is primarily hormonal, not behavioral. Declining progesterone, estrogen fluctuation, and elevated cortisol are the root drivers. Clinical assessment of the full hormonal picture — including progesterone, estrogen, cortisol rhythm, and thyroid — identifies what is disrupted and what can be supported. If you are in Ohio and want that kind of comprehensive evaluation, I work with patients through Optimize & Elevate at optimizeandelevate.com.
Add a consistent breathwork practice
Even 20 minutes of intentional breathwork — whether self-directed or in a guided session — activates the vagal pathways that support parasympathetic dominance and the transition into restorative sleep. For women also carrying anxiety, stored stress, or chronic nervous system dysregulation, breathwork addresses multiple contributing factors simultaneously.
Know your risk factors
APOE4 carrier status, family history, cardiovascular and metabolic health, chronic sleep quality, and hormonal history are all relevant to Alzheimer's risk. Having a proactive conversation with your provider during perimenopause — not after — is one of the most important things a woman can do for her long-term brain health.
Consider sleep position
Research on glymphatic clearance has found that sleeping on the side — particularly the right side — is associated with more efficient cerebrospinal fluid circulation compared to sleeping on the back or stomach. A low-effort change worth knowing about.
The Conversation We Should Have Been Having
What I find most striking about Dr. Mosconi's work, and about the broader emerging science of women's brain health, is how long this conversation has been absent from clinical medicine. Women have been told their perimenopausal cognitive symptoms are normal, temporary, and not worth investigating. The research is telling a different story.
The perimenopause window appears to be a time of real neurological transition — one that creates both vulnerability and genuine opportunity for intervention. The choices made during this window, including how we manage sleep, support hormonal health, and regulate the nervous system, may have implications that extend decades into the future.
This is meant to be empowering, not alarming. The same actions that make you feel better now — better sleep, hormonal support, breathwork, nervous system regulation — may also be protecting your brain for the long term. That is a compelling reason to take them seriously starting today.
If you are in Ohio and ready for clinical hormonal support, I welcome you at Optimize & Elevate (optimizeandelevate.com). And if you want to experience nervous system regulation through 9D Breathwork, my live sessions through The Breath Detox (thebreathdetox.com) are designed with exactly this population in mind.
About the Author
Leslie Burgie, APRN is a nurse practitioner, women's hormone health specialist, and certified 9D Breathwork facilitator based in Ohio. She operates two virtual practices: Optimize & Elevate (optimizeandelevate.com), a women's hormone health practice serving Ohio, and The Breath Detox (thebreathdetox.com), a 9D Breathwork facilitation practice.
Clinical note: This article discusses emerging research and is intended for educational purposes only. It does not constitute individual medical advice. If you have concerns about cognitive health, Alzheimer's risk, or perimenopausal symptoms, please consult with your healthcare provider.