If you’ve found yourself struggling to concentrate more than before—especially since hitting your 40s—you are absolutely not alone. Experiencing brain fog during perimenopause can feel isolating and even a little scary. When our focus and mental clarity shift, it’s easy to think it’s just us. But I promise you, it’s not!
My Personal Experience with Perimenopause Brain Fog
Before I moved into my 40s, I’d heard about some of the common experiences women face after 40, but I dismissed them. I thought, “That won’t happen to me because I know how to prevent it…” How wrong I was! Yes, I do know how to prevent it, but I’m also human and not exempt from the impact of my hormones being in erratic flux. Life gets in the way sometimes, and I don’t always manage to “do all the right things.”
However, this doesn’t mean we’re doomed. It simply means we can learn to minimise the impact and give ourselves grace and understanding when things don’t go as planned.
So, let’s dive into the what, when, why, and what you can do about it!
What is Brain Fog in Perimenopause?
Brain fog is a broad term that covers a range of frustrating symptoms—difficulty focusing, forgetfulness, that ‘cotton wool’ feeling in your head, and constantly flitting between tasks without being able to settle on just one.
You might find yourself:
- Walking into a room and forgetting why you’re there
- Opening a new tab on your computer with no idea what for
- Unlocking your phone only to stare at the screen blankly
Sound familiar? You’re not alone! In fact, about 60% of perimenopausal women report experiencing cognitive changes, according to various population surveys.
Why Does This Happen?
These cognitive changes are often linked to the hormonal shifts of perimenopause. The erratic rise and fall of oestrogen, combined with the steady decline of progesterone, can significantly impact brain function.
It’s common to notice your brain and cognition are different at certain times in your cycle. For example, brain fog is more likely:
- In the late luteal phase up to the first few days of your period
- Around ovulation (whether ovulation occurred or not), when oestrogen peaks and then sharply declines
During perimenopause, the drop in oestrogen can be more rapid and pronounced, resulting in:
- Foggy head and lack of focus
- Restlessness and an inability to settle on one task
- Flitting between tabs or tasks without achieving much
This erratic oestrogen rollercoaster also affects glucose (energy) availability in the brain. When oestrogen drops, less glucose is available to brain cells, leading to brain fog, headaches, lack of concentration, and even migraines.
The Role of Progesterone
Low progesterone levels also contribute to brain fog because progesterone acts as a neurosteroid, directly affecting brain function and cognition. It helps us:
- Feel calm and mentally clear by increasing GABA, a brain chemical that soothes the mind
- Sleep deeply and restoratively, which is essential for memory and focus
Unfortunately, progesterone starts to decline in our late 30s as ovulation becomes less frequent. Even when ovulation occurs, the progesterone output is often less robust.
You might notice symptoms like:
- Poor sleep or insomnia in the second half of your cycle
- Increased anxiety or a restless mind
- More pronounced brain fog and memory issues
The Impact of Stress
Stress is one of the biggest drivers of brain fog and cognitive issues. It affects us by:
- Increasing cortisol levels, which worsens brain fog and memory issues
- Making the oestrogen rollercoaster more erratic, with higher highs and lower lows
- Impacting our ability to ovulate, which affects progesterone levels
With the increased responsibilities and pressures women often face in their 40s, managing stress is more crucial than ever.
What Can Help?
While brain fog can be frustrating, there are plenty of ways to support your brain and cognition during perimenopause:
- Stress Reduction Techniques:
- Yoga and deep breathing exercises can significantly reduce the frequency and intensity of brain fog, anxiety, and even hot flushes.
- Just 3–5 minutes of deep breathing daily can improve mood, focus, and energy.
- Mindful time in nature, Qigong, Tai Chi, and meditation are also effective.
- Exercise:
- Strength training supports the brain and helps glucose enter brain cells more efficiently.
- Avoid overdoing cardio, HIIT, CrossFit, or long runs as they can increase cortisol levels without the cognitive benefits of strength training.
- Nutritional Support:
- Magnesium Glycinate is calming, while Magnesium Taurate or Threonate supports the brain.
- Ensure adequate intake of Zinc, B vitamins (especially B6, Folate, B12), protein, and healthy fats to support hormone production and cognition.
- Foods rich in Choline (e.g., egg yolk, meat, fish, edamame) and Phytoestrogens (e.g., edamame, tofu, tempeh, flax) can also help.
- Adaptogenic Herbs:
- Herbs like Ashwagandha, Holy Basil, and Rhodiola support stress management and cortisol balance.
- Sleep Support:
- Establish a consistent evening wind-down routine.
- Herbal teas containing valerian root or hops can promote relaxation and improve sleep quality.
- Consider Body-Identical Progesterone
- For some women, body-identical progesterone can be helpful. Speak to your doctor about whether this might be suitable for you.
Final Thoughts
Navigating brain fog and cognitive changes during perimenopause can feel overwhelming, but you’re not alone. Understanding why this happens can be empowering and help you take proactive steps to support your brain health.
With the right lifestyle adjustments, nutritional support, and self-compassion, it’s absolutely possible to minimise the impact of brain fog and regain your mental clarity and focus.
If you’re struggling with perimenopause symptoms and want more guidance, consider joining the Empowered Perimenopause Subscription Programme. It’s designed to support you through the stormy hormonal waters of perimenopause, helping you thrive and enjoy life with clarity and confidence.
Join the Conversation!
Have you experienced brain fog during perimenopause? What strategies have helped you? Share your experiences in the comments below or join my Empowered Perimenopause community for more support and connection with like-minded women.
With love,
Francesca
