Perhaps you’re familiar with this unsettling feeling: You’re standing in the middle of the room and have completely forgotten what you actually set out to do. Simple words no longer come to mind, or you feel so mentally exhausted that even routine tasks suddenly seem like an insurmountable mountain.

For many women in midlife, these moments of forgetfulness are mixed with a deep fear—the fear of dementia. Especially if we’ve witnessed our mothers or grandmothers develop Alzheimer’s. The statistics are clear: two-thirds of all people with Alzheimer’s are women.¹

But before you panic: there is a liberating and reassuring realization. There is a growing body of research on this topic, including work by Dr. Lisa Mosconi (neuroscientist, director of the Alzheimer’s Prevention Program at Weill Cornell Medicine, and author of “The Menopause Brain”²) specifically addressing this issue. Her central message: We are not helplessly at the mercy of our fate. Less than 2% of Alzheimer’s cases are purely genetic. ³ For the remaining 98%, lifestyle and—crucially—the menopausal phase play a decisive role.

Here you’ll learn what’s happening in your brain and how you can actively use this time to strengthen your brain for the rest of your life.

Menopause: A Neurological event—not just an ovarian issue

For a long time, medicine has reduced menopause almost exclusively to the reproductive organs. But Dr. Mosconi emphasizes: Menopause is a major neurological transition.

The female brain is rich in estrogen receptors—specifically in the areas that are crucial for our cognitive and emotional functioning:

• •Hippocampus: The memory center
• •Amygdala: The center for emotional processing
• •Brainstem: The control center for sleep and recovery

When estrogen levels fluctuate sharply during perimenopause (the years leading up to the last menstrual period) and eventually decline permanently, these complex systems temporarily stall. Energy production in the brain (known as ATP) decreases. ⁴ The result is what medical professionals refer to as cognitive exhaustion—and what we women know as “brain fog.”

Brain fog vs. dementia: When should you start worrying?

Dr. Mosconi offers a reassuring rule of thumb to distinguish the cognitive exhaustion of menopause from actual dementia:

Your brain isn’t broken in midlife. It’s going through a period of renewal: Your body is adjusting to a stage of life in which pregnancy is no longer possible. The brain breaks down resource-intensive neural connections that were previously needed for the menstrual cycle. The amazing thing: Once this restructuring is complete in postmenopause, brain scans show that the brain has successfully rewired itself—and often even works more efficiently than before.²

Your prevention plan: How to actively support this restructuring

About 40% of Alzheimer’s cases worldwide could be prevented through lifestyle changes.⁵ Three key pillars stand out here:

1. Sleep as a “cleansing cycle” for the brain

During deep sleep, the so-called glymphatic system becomes active—a kind of cleansing system for the brain. It flushes out metabolic waste, inflammatory substances, and precisely those plaques associated with Alzheimer’s.⁶

The problem during menopause: Elevated cortisol levels and hormonal fluctuations suppress melatonin production and disrupt deep sleep.

Tip: Good sleep hygiene is no longer just a matter of comfort, but a medical necessity. Stress-reduction techniques and—after consulting a doctor—supplements such as magnesium glycinate can help calm the nervous system in the evening.

2. Exercise directly protects your brain cells

Women with high cardiovascular fitness in middle age have up to a 30% lower risk of dementia.⁷ Endurance exercise not only improves blood flow and oxygen supply to the brain—working muscles also release the peptide irisin. Irisin can cross the blood-brain barrier and directly protect brain cells from inflammation.⁸

3. Brain-friendly nutrition and antioxidants

The brain is particularly susceptible to oxidative stress but has virtually no defense mechanisms of its own. It relies on nutrients from food:

• •Antioxidants (vitamins C, E, A, and selenium) act as protective shields for brain cells—especially important for former smokers.
• •Omega-3 fatty acids from fatty fish or high-quality algae oil support cell membranes and anti-inflammatory processes.
• •Complex carbohydrates provide the glucose the brain needs to synthesize key neurotransmitters such as glutamate and GABA.

You should, however, largely avoid ultra-processed foods, as they promote silent inflammation throughout the body—and thus also in the brain.

The elephant in the room: Hormone Replacement Therapy (HRT) and dementia

For a long time, there was a persistent rumor that hormone replacement therapy increased the risk of dementia. This claim was often based on the well-known Women’s Health Initiative (WHI) study from 2002.⁹

Dr. Mosconi clears up this misunderstanding: The participants in this study were, on average, already over 60 years old and had long since gone through menopause. When the brain lacks estrogen for years, the corresponding receptors break down. If high-dose synthetic hormones are then administered, they encounter “closed doors.”

More recent observational studies paint a significantly more nuanced picture: If therapy with bioidentical hormones (e.g., micronized progesterone and transdermal estradiol) is started promptly at the onset of menopause—during the so-called “window of opportunity”—the data suggest that it can significantly protect the brain and reduce the risk of Alzheimer’s. ¹⁰ Researchers urgently call for further targeted clinical trials using modern imaging techniques—the results so far are extremely promising, but not definitive—unfortunately.

Your turning point – time for you!

Menopause isn’t a walk in the park. The symptoms can be overwhelming and push us to our limits. But they aren’t an illness—they’re a transition your body is prepared for.

The most important message from the conversation between the two experts is this: self-care is not selfish. Midlife is your critical turning point. Every walk, every extra hour of sleep, and every nutrient-rich meal is a direct investment in your future self. You have the opportunity to lay the foundation for a long life with a clear, healthy, and high-performing brain.

Sources

1. Alzheimer's Association. 2023 Alzheimer's Disease Facts and Figures. Alzheimers Dement. 2023. alzheimer.org
2. Mosconi, L. The Menopause Brain. Avery/Penguin Random House, 2024.
3. Bekris, L.M. et al. Genetics of Alzheimer Disease. J Geriatr Psychiatry Neurol. 2010;23(4):213–227.
4. Brinton, R.D. Estrogen regulation of glucose metabolism and mitochondrial function. Trends Pharmacol Sci. 2008;29(11):602–610.
5. Livingston, G. et al. Dementia prevention, intervention, and care: 2020 report of the Lancet Commission. Lancet. 2020;396(10248):413–446.
6. Iliff, J.J. et al. A Paravascular Pathway Facilitates CSF Flow Through the Brain Parenchyma. Sci Transl Med. 2012;4(147):147ra111.
7. Hörder, H.M. et al. Midlife cardiovascular fitness and dementia. Neurology. 2018;90(15):e1298–e1305.
8. Wrann, C.D. et al. Exercise Induces Hippocampal BDNF through a PGC-1α/FNDC5 Pathway. Cell Metab. 2013;18(5):649–659.
9. Rossouw, J.E. et al. (WHI Investigators). Risks and Benefits of Estrogen Plus Progestin in Healthy Postmenopausal Women. JAMA. 2002;288(3):321–333.

Savolainen-Peltonen, H. et al. Use of postmenopausal hormone therapy and risk of Alzheimer's disease in Finland. BMJ. 2019;364:l665.