Perimenopause Brain Fog: Why You Can't Remember Words (And French Foods That Help)

You are standing in your kitchen, and the word is right there — right on the tip of your tongue — but it will not come.

The name of the spice. The name of your neighbor’s dog. A word you have used a thousand times.

You stand there, frozen, feeling foolish. Your brain is searching, searching, searching. And then, ten minutes later, when you have moved on to something else, the word appears. Cinnamon. Bailey. Whatever it was.

But the terror remains.

Am I losing my mind? Is this early dementia?

I need to tell you something: This is not dementia. This is perimenopause brain fog, and it is one of the most common symptoms that no one warns you about.

My mother experienced this in her late forties. She would stop mid-sentence, frustrated, searching for a word that had simply vanished. She was a teacher — words were her life — and suddenly they were slipping through her fingers like water.

I remember her fear. I remember her sitting at the kitchen table, close to tears, saying, “I am losing myself.”

She was not losing herself. Her estrogen was fluctuating, and her brain was adjusting. Within two years, as her hormones stabilized, her verbal memory returned. But she did not just wait passively. She adjusted her diet, added specific foods that supported brain health, and walked every single day. The French approach to perimenopause has always been food first, patience second, and trust in the body’s wisdom third.

If you are forgetting words, losing your train of thought, or walking into rooms with no idea why you are there, you are not alone. This happens to 40-60% of women during perimenopause. And while it is deeply unsettling, it is also temporary and manageable.

Let me explain what is really happening in your brain, why the American approach often makes it worse, and the specific French foods that help restore cognitive clarity.

Why the American Approach to Brain Fog Fails

When American women start forgetting words in their forties, the first thing they do is Google “early dementia.”

The search results are terrifying. Articles about Alzheimer’s. Cognitive decline. Neurodegeneration. Within minutes, they have convinced themselves they are on an irreversible path toward losing their minds.

So they do what the wellness industry tells them: they buy supplements. Brain support stacks. Nootropics. Ginkgo biloba. Lion’s mane mushroom. Phosphatidylserine. They are taking six different pills before breakfast, hoping something will stop the mental fog.

Then they go to their doctor. And here is what happens: the doctor dismisses it.

“Oh, that is just stress,” they say. Or, “Welcome to getting older.” Or, worse, “Are you sure you are not just overwhelmed?”

The woman leaves the appointment feeling gaslit and more anxious than before. She has been told her very real cognitive symptoms are either normal aging or psychosomatic. So she keeps Googling. She keeps buying supplements. She tries brain training apps. She panics every time she forgets a name.

The problem is not that these women are overreacting. The problem is that no one is connecting the dots between their hormones and their brain function.

In France, when a woman in her forties complains of brain fog, the response is different. Her doctor or her mother or her aunt will say, “Ah, oui, the perimenopause.” Not with dismissal, but with recognition. It is expected. It is normal. It is temporary.

And then comes the practical advice: “Eat more fish. Walk every day. Sleep well. Do not panic.”

French women do not treat brain fog as a medical emergency or a sign of inevitable decline. They treat it as a signal that the body needs support during a transition. And that support comes primarily from food.

Not supplements. Not apps. Not catastrophizing.

Food.

What Is Actually Happening in Your Brain During Perimenopause

Let me explain the biology, because understanding what is happening makes it much less frightening.

Estrogen is not just a reproductive hormone. It is a neuroprotective hormone. It influences the production and regulation of neurotransmitters — serotonin, dopamine, acetylcholine, norepinephrine — all of which are essential for focus, memory, mood regulation, and word retrieval.

When estrogen levels fluctuate during perimenopause, these neurotransmitter systems become unstable. Your brain is literally operating with less chemical support than it is used to.

Specifically, estrogen affects:

Acetylcholine: Critical for memory formation and word retrieval. When estrogen drops, acetylcholine production decreases, and suddenly you cannot find the word you need.
Serotonin: Regulates mood and cognitive flexibility. Low serotonin makes it harder to shift focus or think clearly.
Dopamine: Affects motivation, attention, and executive function. When dopamine dips, even simple tasks feel overwhelming.
BDNF (Brain-Derived Neurotrophic Factor): Estrogen promotes the production of BDNF, a protein that supports the growth and survival of brain cells. When estrogen drops, BDNF drops, and your brain has less capacity to form new neural connections.

This is why you forget words. This is why you walk into a room and forget why. This is why reading a paragraph takes three tries.

A landmark study from the University of Rochester Medical Center, published in Neurology, tracked cognitive function in women as they transitioned through perimenopause. The researchers found that women in early perimenopause showed measurable declines in verbal learning, verbal memory, and processing speed.

But here is the critical part: these changes were temporary. As women moved through perimenopause and into postmenopause, cognitive function stabilized. The brain adapted.

The fear that brain fog is the beginning of Alzheimer’s is understandable, but unfounded. Perimenopause brain fog is a hormonal symptom, not a neurodegenerative disease.

However, there is a difference between temporary hormone-related brain fog and persistent cognitive decline. If your symptoms are severe, progressive, or accompanied by confusion, disorientation, or significant memory loss beyond occasional word-finding difficulties, you should see a neurologist. But for the vast majority of women, what they are experiencing is normal, temporary, and responsive to lifestyle and dietary changes.

The French Foods That Support Brain Health During Perimenopause

French women do not rely on brain supplements. They rely on brain foods.

These are not exotic or expensive. They are everyday staples of the French diet, chosen for their omega-3 fatty acids, antioxidants, B vitamins, and polyphenols — all of which support neurotransmitter production, reduce inflammation, and protect brain cells.

1. Sardines and Small Oily Fish

Why they work: Sardines are one of the richest sources of omega-3 fatty acids (EPA and DHA), which are critical for brain cell membrane health and neurotransmitter function. DHA makes up 40% of the fatty acids in your brain. When you are deficient, cognitive function suffers.

Sardines are also high in vitamin B12, which supports myelin production (the protective coating around nerve cells) and prevents cognitive decline.

How French women eat them: On toast with lemon and parsley. In salads with butter lettuce and hard-boiled eggs. Straight from the tin with a drizzle of olive oil.

My mother kept tins of sardines in the pantry at all times. When her brain fog was at its worst, she would have sardines for lunch three or four times a week. She swore it helped.

2. Walnuts

Why they work: Walnuts are the only nut with significant omega-3 content (alpha-linolenic acid, or ALA), and they are rich in polyphenols and vitamin E — both powerful antioxidants that protect the brain from oxidative stress.

A study published in The Journal of Nutrition, Health & Aging found that walnut consumption was associated with better cognitive function, including improved memory, concentration, and processing speed.

How French women eat them: A small handful with cheese after dinner. Chopped into salads. Ground into vinaigrettes.

Not a whole bag while watching television. A measured portion, enjoyed mindfully.

3. Dark Leafy Greens (Spinach, Arugula, Watercress)

Why they work: Dark greens are loaded with folate, vitamin K, and lutein — all of which support cognitive function and slow age-related cognitive decline.

Folate is essential for neurotransmitter synthesis. Vitamin K supports brain cell signaling. Lutein protects the brain from inflammation.

A study from Rush University found that people who ate one serving of leafy greens per day had the cognitive abilities of someone 11 years younger.

How French women eat them: In salads with a mustard vinaigrette. Wilted into omelets. As a side dish with olive oil and garlic.

Every single day. Not as a “superfood trend,” but as a normal part of lunch or dinner.

4. Extra Virgin Olive Oil

Why it works: Olive oil is rich in monounsaturated fats and polyphenols, particularly oleocanthal, which has anti-inflammatory properties similar to ibuprofen. Chronic inflammation is a major contributor to cognitive decline.

The PREDIMED study, published in JAMA Internal Medicine, found that a Mediterranean diet rich in olive oil significantly improved cognitive function compared to a low-fat diet.

How French women use it: Drizzled on vegetables. Whisked into vinaigrettes. Used as a base for sautéing greens or fish.

Never as a “treatment.” Always as a staple.

5. Eggs (Especially the Yolks)

Why they work: Egg yolks are one of the richest dietary sources of choline, a nutrient critical for acetylcholine production. Acetylcholine is the neurotransmitter most directly involved in memory and word retrieval.

Low choline intake is associated with poor cognitive performance and increased risk of cognitive decline.

Eggs also provide B vitamins (B6, B12, folate) and healthy fats that support brain cell structure.

How French women eat them: Soft-boiled with soldiers of toast. In omelets with herbs and greens. Poached over asparagus.

Daily, without fear or guilt.

6. Dark Chocolate (70% Cacao or Higher)

Why it works: Dark chocolate is rich in flavonoids, caffeine, and theobromine — all of which improve blood flow to the brain and enhance cognitive function.

A study from Loma Linda University found that consuming dark chocolate improved memory, mood, and immune function.

How French women eat it: Two or three squares after lunch or dinner. Not a whole bar. Not as a “cheat.” As a normal, pleasurable part of the day.

7. Red Wine (in Moderation)

Why it works: Red wine contains resveratrol, a polyphenol with neuroprotective properties. It increases blood flow to the brain and may support BDNF production.

The key word is moderation. One small glass with dinner, a few times a week. Not a bottle. Not daily.

How French women drink it: With dinner, slowly, as part of the meal. Never alone. Never as a coping mechanism.

8. Fresh Herbs (Rosemary, Thyme, Parsley, Sage)

Why they work: Herbs are concentrated sources of antioxidants and volatile oils that support cognitive function. Rosemary, in particular, has been shown to improve memory and concentration.

How French women use them: Chopped into salads, eggs, and vinaigrettes. Infused into soups and roasted vegetables. Fresh, not dried, whenever possible.

The Three-Meal Structure and Blood Sugar Stability

One of the most overlooked contributors to brain fog is blood sugar instability.

When your blood sugar spikes and crashes, your brain suffers. The brain is an incredibly energy-hungry organ — it uses about 20% of your body’s glucose even though it only makes up 2% of your body weight. When glucose delivery is erratic, cognitive function becomes erratic too.

American women often eat this way:

Skip breakfast or have coffee and a muffin
Graze on snacks all morning
Have a salad for lunch
Crash at 3 p.m. and eat more snacks
Overeat at dinner

This constant snacking creates constant insulin spikes and crashes, which leads to brain fog, irritability, and fatigue.

French women structure their eating differently: three meals, no snacking.

Breakfast: Protein and fat (eggs, cheese, yogurt, nuts). This stabilizes blood sugar for hours.
Lunch: The largest meal. Protein, vegetables, healthy fats, often a small piece of bread. This sustains energy through the afternoon.
Dinner: Lighter than lunch. Soup, salad, fish, vegetables. Easy to digest before bed.

No snacks. No grazing. No constant eating.

This structure keeps insulin levels stable, which keeps glucose delivery to the brain stable, which keeps cognitive function stable.

When my mother was struggling with brain fog, one of the first things she changed was eliminating snacks. She had always been a grazer — a piece of fruit here, a handful of nuts there, a biscuit with tea. When she switched to three structured meals with no snacking, her mental clarity improved within days.

It was not magic. It was blood sugar stability.

Walking and Brain-Derived Neurotrophic Factor (BDNF)

There is one more critical piece of the French approach to brain fog: daily walking.

Walking is not just good for your body. It is one of the most powerful interventions for brain health.

When you walk, especially at a moderate pace, you increase blood flow to the brain. This delivers more oxygen and glucose, which improves cognitive function immediately.

But the long-term benefit is even more profound: walking increases the production of BDNF, the protein that supports the growth and survival of brain cells.

A study published in Proceedings of the National Academy of Sciences found that moderate aerobic exercise (like walking) increased hippocampal volume and improved memory in older adults. The hippocampus is the brain region most affected by hormonal fluctuations during perimenopause.

French women walk every day. Not as “exercise.” As life. To the market. To the bakery. To meet a friend for coffee. They walk because it is pleasant and practical, not because they are trying to burn calories or “optimize brain health.”

But the effect is the same: better blood flow, higher BDNF, clearer thinking.

My mother walked every morning before work. She said it was the only time her head felt clear. She was not wrong.

What French Women Do NOT Do for Brain Fog

Let me tell you what French women do not do, because this is just as important.

They do not take ten different brain supplements. No stacks of nootropics. No lion’s mane capsules. No ginkgo biloba. They eat food that supports brain health, and they trust that the body knows how to use it.

They do not do “brain training apps.” They read books. They have conversations. They cook complex meals. They engage their brains naturally, through daily life, not through gamified tasks on a screen.

They do not catastrophize. They do not spiral into fear every time they forget a word. They accept that this is part of the transition, and they trust that it will pass.

They do not isolate themselves. American women often withdraw when they are struggling cognitively, embarrassed by their forgetfulness. French women stay social. They have lunch with friends. They talk. They laugh. Social connection is neuroprotective.

They do not blame themselves. They do not think, “I should be sharper. I should be more disciplined. I should be able to remember this.” They understand that their brain is adjusting to a new hormonal reality, and they give themselves grace.

The French Brain Fog Protocol: A Practical Framework

If you are struggling with perimenopause brain fog, here is what I would suggest. Not as a prescription, but as a framework. A way of eating and living that supports your brain during this transition.

Breakfast

2 eggs (soft-boiled, poached, or scrambled with butter)
A handful of walnuts or a slice of bread with almond butter
A small piece of cheese (if you tolerate dairy)
Coffee or tea (not on an empty stomach)

This combination provides choline, omega-3s, healthy fats, and protein. It stabilizes blood sugar and gives your brain the building blocks it needs.

Lunch (the largest meal)

A serving of oily fish (sardines, mackerel, salmon) or eggs or chicken
A large green salad with arugula, spinach, or watercress
Olive oil vinaigrette with mustard and lemon
A small piece of bread (if you want it)
Optional: a few squares of dark chocolate for dessert

This meal is rich in omega-3s, folate, vitamin K, and polyphenols. It sustains energy and cognitive function through the afternoon.

Dinner (lighter)

A bowl of vegetable soup or a small portion of fish
Steamed or roasted vegetables with olive oil and fresh herbs
Optional: a small glass of red wine

Dinner should be easy to digest. Not heavy. Not rushed.

Daily Habits

Walk for 30-45 minutes, ideally in the morning or after lunch.
No snacking between meals.
Sleep 7-8 hours in a cool, dark room. (Sleep deprivation is one of the fastest ways to worsen brain fog.)
Drink water, not constantly, but at meals and when thirsty.

What to Avoid

Processed foods, especially those high in refined sugar and seed oils. These promote inflammation and worsen cognitive function.
Constant snacking, which destabilizes blood sugar.
Excessive alcohol, which disrupts sleep and neurotransmitter balance.
Chronic stress, which depletes neurotransmitters and worsens brain fog. (Easier said than done, I know. But walking, eating well, and sleeping help.)

This is not a “diet.” It is a way of eating that supports brain health during a hormonally turbulent time.

My mother ate this way. Not perfectly. Not rigidly. But consistently. And her brain fog lifted. Not overnight, but gradually, over months.

Brain Fog, Fatigue, and Anxiety: The Perimenopause Triad

Brain fog rarely exists in isolation. Most women who experience cognitive symptoms during perimenopause also struggle with fatigue and anxiety.

These symptoms are interconnected. When estrogen fluctuates, it affects serotonin (mood), dopamine (motivation and focus), and cortisol (stress response). So you feel foggy, exhausted, and anxious all at once.

The French approach addresses all three with the same tools: structured meals, omega-3 rich foods, daily movement, and social connection.

You cannot think clearly when you are exhausted. You cannot calm your anxiety when your blood sugar is unstable. The brain, the body, and the hormones are not separate systems. They are one system.

Treating brain fog in isolation — with supplements or brain training apps — misses the bigger picture. You need to support your entire system.

The Bigger Picture: Food and Hormones

There is one more connection I want to make, because it surprised me when I learned it.

The foods that support brain health during perimenopause are the same foods that help regulate GLP-1, the hormone that controls appetite and satiety.

Omega-3s, protein, fiber, and healthy fats all stimulate GLP-1 production. This is why women who eat French foods that work like Ozempic often report not just better appetite control, but better mental clarity too.

GLP-1 receptors are found in the brain, particularly in areas involved in cognition and mood regulation. When GLP-1 signaling is strong, cognitive function improves.

So the foods that help you feel satisfied, that prevent overeating, that stabilize your blood sugar — those same foods are protecting your brain.

This is not a coincidence. This is how the body is designed to work when you feed it real food.

A Medical Note: When to See a Doctor

I need to be clear about something: perimenopause brain fog is normal and temporary. But persistent, severe, or progressive cognitive decline is not.

If you are experiencing:

Severe memory loss that interferes with daily life
Disorientation or confusion (getting lost in familiar places, not recognizing familiar people)
Difficulty with language beyond occasional word-finding difficulties (aphasia)
Significant changes in judgment or decision-making
Symptoms that worsen over time rather than fluctuate

You need to see a neurologist. These symptoms warrant evaluation for other causes of cognitive impairment, including thyroid disorders, vitamin deficiencies, sleep apnea, or neurodegenerative conditions.

But for the vast majority of women in their forties who are forgetting words, losing their train of thought, or feeling mentally foggy, the cause is hormonal, not neurological. And the solution is not medication or panic. It is food, movement, sleep, and patience.

Final Thoughts

You are not losing your mind.

You are in perimenopause, and your brain is adjusting to fluctuating estrogen levels. This is normal. This is temporary. This is not dementia.

The word you cannot find is still there. It is just temporarily inaccessible because your neurotransmitters are in flux.

You do not need a stack of brain supplements. You do not need to catastrophize. You need to eat foods that support neurotransmitter production, stabilize your blood sugar, walk every day, sleep well, and trust that your brain will adapt.

My mother came through this. I have come through this. You will too.

Feed your brain. Move your body. Be patient with yourself.

And when the word you are searching for finally appears — because it will — acknowledge it, and move on.

You are not broken. You are in transition.

If you are struggling with brain fog, fatigue, or other perimenopause symptoms, I have created a free guide that walks you through the French approach to hormonal health. It includes meal ideas, daily habits, and the exact framework I use to support women during this transition.

Take the free quiz here to discover your perimenopause type and get the guide.

Medical Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. If you are experiencing severe or progressive cognitive symptoms, please consult a healthcare provider or neurologist. Perimenopause brain fog is common and typically temporary, but persistent cognitive decline should always be evaluated by a qualified medical professional.