Is It Brain Fog or Something More? Understanding Cognitive Changes in Perimenopause
When my dad was diagnosed with dementia in his late 60s, something quietly shifted inside me. Of course, there was the heartbreak — watching someone you love begin to change in ways you can’t control. But beneath that grief, there was something else I didn’t expect: an awareness of my own brain in a way I had never experienced before.
I started paying attention to every lapse, every pause. My memory itself has never really been the issue. I can remember appointments, conversations, the details of my day. What unsettles me is the word recall. I’ll be mid-sentence, reaching for a word I’ve used a hundred times before, and suddenly it’s just… gone. I can see the concept in my mind, I know what I want to say, but the word won’t come. And ever since my dad’s diagnosis, those moments don’t feel insignificant. They feel charged.
Around that same time, I was navigating mold illness, which added another layer of uncertainty. I remember thinking, almost pleading internally, “Maybe it’s the mold. Please let it be the mold.” Mold felt external. Temporary. Something I could address and improve. Genetics felt heavier. Genetics felt like something written into my future.
I talk about this fear lightly sometimes, but I don’t really say it out loud to doctors. Not fully. Not directly. There’s always that quiet hesitation — just in case. Just in case saying it makes it more real.
And I know I’m not alone in that thought. So many women in perimenopause start noticing changes in focus, recall, or mental clarity and wonder the same thing: Is this normal hormonal brain fog… or is it something more?
So what is actually happening?
First, it’s important to normalize this: cognitive shifts during perimenopause are common. They are real. And they do not automatically mean decline.
Perimenopause isn’t just a reproductive transition. It’s a neurological one.
Estrogen plays a major role in brain function. It supports neurotransmitters like serotonin and dopamine, which influence mood and motivation. It also supports acetylcholine, which is involved in memory and learning. Estrogen even helps the brain use glucose efficiently for energy and maintain healthy communication between brain cells.
When estrogen begins to fluctuate unpredictably, the brain feels it.
This is why many women notice changes in word recall, focus, and mental stamina. Not true memory loss, but a sense that thoughts move more slowly or words don’t come as easily.
Progesterone also matters. It has calming effects in the brain, and as levels decline, many women become more stress sensitive and sleep more lightly. Poor sleep and elevated stress alone can significantly impact cognitive clarity.
Then we layer in everyday life. Blood sugar swings, muscle loss, chronic stress, and disrupted sleep all affect how sharp we feel. The brain is deeply connected to metabolic and hormonal health.
That foggy, slightly slower feeling so many women describe is often the result of shifting hormones interacting with stress and lifestyle factors. It is not usually a sign that your brain is failing. It is your brain responding to change.
Of course, rapid cognitive decline, major personality changes, or severe memory impairment should always be discussed with a healthcare provider. But gradual word-finding difficulty and mental fatigue during midlife are incredibly common.
And this is the empowering part. Perimenopause is also a window. A window to intentionally support your brain in ways that can influence how you feel now and how you age long term.
If perimenopause is a neurological transition, then it makes sense that we support the brain intentionally during this time.
The encouraging truth is that the same habits that stabilize hormones also protect cognitive function. You don’t need a complicated biohacking routine. You need consistency in a few key areas.
Strength Training:
Lift weights two to four times per week. Strength training supports blood sugar stability, reduces inflammation, and helps maintain the neural connections that support cognitive function.
Nutrition:
Prioritize protein at every meal. Protein helps stabilize blood sugar and provides the building blocks your brain needs to produce neurotransmitters that support focus, mood, and memory.
Sleep:
Protect your sleep as much as possible. Aim for a consistent sleep routine, reduce late-night screen exposure, and create an environment that supports deep, restorative rest.
Stress:
lower daily stress where you can. Regular walks, time outdoors, prayer, journaling, or quiet moments throughout the day can help regulate cortisol and support clearer thinking.
Supplementation:
Omega-3 fatty acids, magnesium, and B vitamins are all involved in brain and nervous system health. Talk with your healthcare provider about whether additional support may be right for you.
These steps may seem simple, but they are powerful when practiced consistently.
If you’ve been quietly wondering whether the changes you’re noticing are normal, you’re not alone. Perimenopause can bring unexpected shifts, but it can also be a powerful opportunity to support your body and brain in new ways.
And if you’d like guidance navigating this stage of life, from hormones to metabolism to brain health, I’d love to help you own your journey
This Blog Post is for educational and informational purposes only and solely as a self-help tool for your own use. I am not providing medical, psychological, or nutrition therapy advice. You should not use this information to diagnose or treat any health problems or illnesses without consulting your own medical practitioner. Always seek the advice of your own medical practitioner and/or mental health provider about your specific health situation. For my full Disclaimer, please go to www.sandraadamswellness.com/new-page-1
