Brain fog, broken sleep and feeling “flat, not myself” – new data from 1,001 women reveals the side of menopause nobody warned us about, and why hot flushes are only a small part of the story.
You walk into the kitchen and can’t remember why. A colleague’s name slips away mid-sentence. You wake at 3am, wide awake and exhausted at the same time. And because there isn’t a hot flush in sight, menopause is the last thing on your mind.
Perhaps it shouldn’t be. New data from 1,001 women who completed The Menopause Co.‘s symptom quiz reveals that 97% report changes to their thinking or memory – while almost half (47%) experience neither hot flushes nor night sweats, the two symptoms most of us were taught to look out for.
Released as World Menopause Month draws to a close, the findings paint a far more complex picture of the menopause transition than the textbook version – and they land alongside major new research into what actually happens to the brain.
The symptoms nobody warned us about
The women who took the quiz weren’t dealing with a single problem. A staggering 81% were managing four or more symptoms at once, rating their severity at an average of 7.4 out of 10.
The most commonly reported symptoms were:
- Fatigue: 79.7%
- Brain fog: 75.3%
- Anxiety: 71.9%
- Trouble sleeping: 67.6%
- Mood swings: 66.8%
- Low libido: 64.7%
And the so-called classics? Hot flushes (37.6%) and night sweats (39.9%) were the two least commonly selected named symptoms in the entire dataset.
What it feels like, day to day
Behind the percentages are the small daily moments that chip away at confidence. Among the women who took the quiz:
- 50.5% wake during the night – the most commonly reported day-to-day experience
- 42.2% report forgetting things
- 41.1% describe feeling “flat, not myself”
- 37% describe feeling “wired but tired”
- 34.7% describe feeling “anxious, on edge”
- 19.8% say brain fog affects their work
That last figure deserves a pause. One in five women say cognitive changes are affecting their confidence at work – often at the very stage of life when they’re leading teams, running businesses and juggling everyone else’s needs as well as their own.
It starts earlier than you think
One of the most striking findings is how early this begins. Around two-thirds of quiz takers were perimenopausal rather than menopausal – and 63% of women in early perimenopause rated their symptoms 7 or higher out of 10.
That matters. A woman who is foggy, anxious, exhausted and sleeping badly – but has no hot flushes – may never connect the dots. She’s far more likely to blame stress, a busy life or simply getting older.
What the science says about the ‘menopause brain’
The Menopause Co.’s data adds an Australian, lived-experience perspective to a question scientists are now investigating in earnest.
A large UK Biobank study led by researchers at the University of Cambridge and published in Psychological Medicine in January 2026 analysed data from almost 125,000 women, including brain scans from around 11,000 of them. The researchers found reduced grey matter volume after menopause in regions of the brain involved in memory, emotion and cognitive control, including the hippocampus, entorhinal cortex and anterior cingulate cortex.
Post-menopausal women in the study were also more likely to report anxiety, depression, insomnia and tiredness.
Some of these regions are also affected by Alzheimer’s disease, the most common form of dementia. However, the study did not establish that menopause causes Alzheimer’s. The researchers say it may be one reason dementia is more common in women than men – but, as co-author Dr Christelle Langley put it, “not the whole story”.
The picture on hormone replacement therapy (HRT) was mixed. HRT didn’t appear to prevent the reductions in grey matter, but it was associated with a slower decline in reaction times. The groups didn’t differ significantly on memory tasks – a reminder that this is an emerging field with much still to learn.
Even so, the research gives scientific weight to the questions so many women have been asking for years: Why don’t I feel like myself? Why am I forgetting things? Why is it suddenly so hard to concentrate?
One woman, many menopauses
The Menopause Co.’s analysis of 1,057 quiz submissions (including retakes) identified eight recognisable patterns of menopause experience. They’re descriptive rather than diagnostic – designed to help women recognise combinations of symptoms they may be having, rather than slotting everyone into one box.
Women’s natural health and hormone expert Nat Kringoudis, the brand’s ambassador, has supported more than 30,000 women over 20 years of clinical practice. She says the shifting nature of symptoms is what catches so many women off guard.
“Menopause has a habit of moving the goalposts. You finally get your sleep back on track and suddenly it’s your mood, your weight or your libido that’s gone sideways. It looks different for every woman and can look different for the same woman from one month to the next.”
Nat Kringoudis
A layered approach to support
That thinking underpins The Menopause Co., an Australian-made, TGA-listed, naturopath-formulated range that bills itself as the world’s first layered supplement system for perimenopause and menopause.
Rather than one formula for everything, the six-part system – Foundation, Sleep, Focus, Libido, Energy and Mood – starts with Foundation, then layers targeted support on top according to each woman’s symptoms. A two-minute symptom quiz helps guide the choice. The range draws on more than 30 years of clinical experience, comes in reusable glass jars with compostable sachets, and each formula is A$69.
“That’s why layering support makes so much sense,” says Kringoudis. “Start with securing the foundation, then add what you need based on what your body is actually telling you … You can tailor the formulas to what’s showing up for you now, and change that support as you change.”
If this sounds like you
- Keep a symptom diary. Note your sleep, mood, energy, memory lapses and cycle changes for a few weeks. Patterns are much easier to spot on paper.
- See your GP – even without hot flushes. Perimenopause can begin years before your final period. The Australasian Menopause Society lists doctors with a special interest in menopause.
- Get the facts. Jean Hailes for Women’s Health has free, evidence-based information on perimenopause and menopause.
- Check before you add supplements. If you take prescription medicines, ask your GP or pharmacist before starting any herbal formula.
For more practical support, read Menopause Symptoms: 10 Everyday Changes That Can Help and The Menopause Conversation We’re Not Having.
The bottom line
Menopause isn’t one universal experience, and it was never just about hot flushes. If you’re foggy, flat, wired and tired – and wondering where the woman you used to be has gone – you’re far from alone. And you deserve support that fits the menopause you’re actually having.
About the data: The findings are based on self-reported responses from 1,001 unique women who completed The Menopause Co.’s symptom quiz over 14 weeks (1,057 submissions including retakes). These women were self-selected and already seeking menopause support, so the results are not a population-level estimate of symptoms among Australian women. Responses describe participants’ reported experiences and are not diagnostic assessments.
