Latest / The Sirona Health Podcast: PMDD, Hormones & Mental Health / Brain Fog in Menopause: What's Actually Happening in Your Head

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Brain Fog in Menopause: What's Actually Happening in Your Head · The Sirona Health Podcast: PMDD, Hormones & Mental Health

• 0:04
  Hormones don't just run your cycle.
• 0:07
  They run your mood, your mind, your whole sense of self.
• 0:11
  I'm Dr.
• 0:12
  Georgina Standen, GP and founder of Sirona Health, and this is the Sirona Health Podcast, where we talk about the relationship between female hormones and mental health properly, without the mystique and without the dismissal.
• 0:27
  In the last episode, we talked about mood, anxiety, sleep, and the way perimenopause can destabilize a nervous system that's always been a bit more hormonally reactive.
• 0:39
  But there's another symptom that comes up in almost every single consultation I have with women in this age group, and it isn't mood at all.
• 0:49
  It's this feeling of walking into a room and not knowing why you're there, losing a word mid-sentence, reading the same paragraph three times.
• 1:00
  Today, I want to properly unpack brain fog, what it actually is, what's driving it, and because this is the question underneath almost every version of this conversation, whether it means something worse is coming.
• 1:15
  Brain fog isn't a diagnosis, it's a description, and it's worth being precise about what's inside it because the phrase gets used as a catch-all.
• 1:26
  When women describe it to me, it usually clusters around a few things: trouble learning and holding onto new information, a name, a number, something someone just told them; difficulty concentrating or keeping a train of thought, especially when switching between tasks; a general sense of mental fuzziness or slowness; and for a good number of women, something that looks a lot more like an attention problem than a memory problem, struggling to organize a task, get started on it, sustain effort through it, and regulate frustration along the way.
• 2:07
  That last cluster is interesting because it overlaps quite closely with how adult ADHD presents, and some researchers in this field have made exactly that comparison.
• 2:19
  It doesn't mean these women have ADHD.
• 2:22
  It means the underlying systems, attention, working memory, processing speed, are hormonally sensitive in the same way mood and sleep are.
• 2:33
  It's actually part of why I've got a whole episode later in the series looking specifically at how PMDD and ADHD overlap Because this exact pattern, hormone-sensitive attention and executive function, keeps showing up wherever we look I want to address this early because I think it's the thing sitting underneath most of these consultations, even when nobody says it out loud.
• 3:00
  Does this mean I'm heading towards dementia?
• 3:03
  Almost always no, and I want to give you the actual reasoning, not just reassurance for its own sake.
• 3:10
  Dementia at midlife is rare.
• 3:13
  We're talking a small fraction of percent in any given population, and unless there's a strong family history of early onset Alzheimer's disease specifically, it isn't the explanation for a woman in her 40s or 50s forgetting where she put her keys.
• 3:31
  I do want to connect this back to something I covered a couple of episodes ago when I talked about the brain scan research because I don't want to contradict myself.
• 3:40
  I mentioned then that menopause is associated with measurable changes in brain regions relevant to memory, and that researchers think this may make women somewhat more vulnerable to dementia later in life, which is part of why the condition affects women disproportionately.
• 3:59
  That's real, and I'm not walking it back, but being more vulnerable at a population level over decades is a very different thing from what's happening in a woman's brain during perimenopause itself.
• 4:12
  What the longitudinal research on the perimenopausal transition specifically actually shows is a real measurable temporary dip, mainly in verbal learning and memory, sometimes in attention and processing speed too, that tends to emerge in perimenopause and for most women, largely resolves once they're through to the other side.
• 4:37
  Midlife women turn out to be unusually accurate judges of their own cognitive difficulty, better than most other groups asked to predict their own test performance.
• 4:47
  So when a patient tells me something feels wrong, I take that seriously as data, not just as anxiety.
• 4:55
  There is a smaller group of women for whom the changes are more pronounced and take longer to settle, and we'll come back to who tends to fall into that group.
• 5:05
  But the headline is one I want you to actually hold onto: normal, common, usually mild, usually temporary.
• 5:15
  So if you've been with this series from the start, none of this will feel unfamiliar because it's the same architecture we've talked about before, just showing up in a different domain Oestrogen receptors are dense in exactly the brain regions responsible for learning and memory, particularly the hippocampus, and in areas involved in attention and emotional regulation too.
• 5:40
  So it makes biological sense that as oestrogen becomes unpredictable through perimenopause, cognition would feel unpredictable too.
• 5:50
  We actually have quite strong evidence for causation here, not just correlation.
• 5:56
  Older studies looking at women who had their ovaries surgically removed found a clear drop in verbal memory that could be reversed by giving estrogen back.
• 6:06
  The same pattern shows up with medications that deliberately suppress estrogen for other medical reasons.
• 6:13
  Take estrogen away, memory dips.
• 6:16
  Restore it, memory recovers.
• 6:19
  That's about as close to proof of a causal hormonal mechanism as this field gets.
• 6:25
  Interestingly, verbal memory is a domain where women typically outperform men on average, and is also one of the domains most sensitive to early Alzheimer's changes.
• 6:37
  That overlap is part of why this particular symptom gets so much attention and part of why it's so important to say that a temporary hormonal dip and an early neurodegenerative process are not the same thing, even though they can touch some of the same territory This is the part I really want you to take away from today because it's the most clinically useful piece, and it connects directly to things we've already covered in this series.
• 7:09
  Hot flushes matter more for cognition than most people realize, including a lot of women themselves.
• 7:16
  Objective monitoring shows women consistently under-report how many they're actually having, and flushes can persist for years, sometimes into a woman's 60s, well past what people assume is the menopause window.
• 7:32
  There's a growing body of evidence linking frequent hot flushes directly to memory difficulty independent of sleep.
• 7:41
  In one proof of concept study, treating hot flushes with a non-hormonal procedure led to a real improvement in memory even though the treatment itself has no direct effect on the memory system.
• 7:55
  That's a strong signal that the flushes themselves are part of the mechanism, not just an associated nuisance.
• 8:02
  Sleep is the second amplifier, and if you listened to the last episode, you already know how central I think it is.
• 8:10
  Fragmented sleep during perimenopause is common, partly because of night sweats and partly because of estrogen's role in temperature and melatonin regulation.
• 8:21
  In cohort studies, the women who struggle most with memory during this transition are disproportionately the ones with disrupted sleep.
• 8:30
  Treat the sleep, and cognition very often follows.
• 8:34
  And mood is the third.
• 8:36
  Even mild depressive symptoms are linked to measurable memory difficulty in midlife, which is exactly the overlap I was describing in the last episode about mood vulnerability and cognitive symptoms.
• 8:49
  They're not separate stories.
• 8:51
  They're the same story told from different angles.
• 8:55
  So when a woman comes to me with brain fog, I'm not just thinking,"Is this menopause?" I'm asking specifically about flushes she might be dismissing, sleep she might be normalizing, and mood she might be attributing entirely to being busy or tired.
• 9:12
  Treating those three things properly is very often where the cognitive improvement actually comes from Not every woman experiences this the same way, and there are a few patterns worth naming.
• 9:26
  Women with cognitive reserve going into perimenopause, built up over a lifetime through education, cognitively engaging work, and mentally stimulating activity, seem to tolerate the hormonal disruption better in the same way a stronger foundation tolerates a bigger shock.
• 9:47
  Women with more persistent or severe menopausal symptoms generally, not just flushes, seem to be at a greater risk of the cognitive symptoms lingering rather than resolving.
• 10:00
  And there's emerging evidence that women facing chronic stress, limited access to healthcare, or socioeconomic disadvantage may experience more pronounced and more persistent cognitive effects, an area of research that badly needs more attention because most of what we know comes from relatively narrow, well-resourced study populations so where does HRT fit?
• 10:25
  This is a question I get asked constantly, so let me be precise, because the honest answer is more nuanced than either HRT fixes brain fog or HRT does nothing.
• 10:37
  The large randomized trials we have don't show hormonal therapy improving cognition when it started after menopause is established.
• 10:46
  But there's an important caveat.
• 10:48
  Those trials were done in women without significant hot flushes, and largely after the perimenopausal window when the cognitive symptoms actually first appear.
• 10:59
  So we don't have good trial evidence on the group that matters most for this conversation, women in perimenopause with bothersome symptoms right when brain fog tends to start.
• 11:12
  That's a real gap in the research, not a settled negative.
• 11:17
  What I'd say clinically is this: HRT isn't currently something I'd prescribe specifically to treat brain fog.
• 11:25
  But if a woman has significant hot flushes and disrupted sleep and those improve with treatment, whether that's HRT or another appropriate approach, her cognition very often improves alongside them for the reasons I just went through.
• 11:41
  It's not that estrogen is directly sharpening her memory, it's that we've removed two of the biggest drivers sitting underneath it.
• 11:50
  There's also a longer term question people ask about dementia prevention specifically, and I want to be straight with you.
• 11:57
  This lines up with what I said a couple of episodes ago.
• 12:00
  The evidence is properly mixed and complicated, with some large studies suggesting a modest protective signal and others suggesting the opposite depending on when treatment starts and what's being measured.
• 12:14
  Current evidence is clear that HRT shouldn't be started at any age purely to prevent future dementia or treat cognitive symptoms.
• 12:24
  The exception is women who go through early or surgical menopause, where there's a clearer case for hormone replacement to protect long-term brain health alongside all the other reasons we'd normally recommend it to that group Beyond treating flushes, sleep, and mood directly, the same broad brain health foundations that matter throughout life matter here, too.
• 12:48
  Good cardiovascular health, regular physical activity, a Mediterranean-style way of eating, staying socially connected, and keeping the brain properly challenged rather than coasting.
• 13:01
  None of that is menopause-specific advice, and I don't want to pretend it is, but midlife is a particularly good moment to take it seriously because it's also when several other risk factors for future cognitive health, blood pressure, weight, alcohol tend to start mattering more.
• 13:20
  So here's what I want you to leave with today.
• 13:23
  Brain fog in perimenopause is real.
• 13:25
  It's common.
• 13:27
  It's been properly validated in research, and for the vast majority of women, it is not a sign of dementia, and it does resolve.
• 13:36
  If it's happening to you, it's worth asking specifically whether your flushes, your sleep, or your mood might be sitting underneath it, because those are the levers that tend to move things.
• 13:49
  And if you're someone whose symptoms have felt more persistent or more severe than what I've described today, that's exactly the kind of pattern worth bringing to whoever you see about your menopause care rather than assuming it's just what 45 looks like now.
• 14:05
  Next time, we're moving properly into the medical toolkit, starting with medication options and how to actually think about choosing a pill.
• 14:13
  It's a practical one, and I think it'll answer a lot of the,"So what do I actually do?" questions this series tends to generate.
• 14:23
  That's it for today.
• 14:24
  I'm Georgina.
• 14:25
  Thanks for listening.
• 14:27
  A quick note before you go.
• 14:29
  This podcast is for general information, not individual medical advice.
• 14:33
  It doesn't replace seeing your own GP or a specialist.
• 14:37
  So if anything you've heard today feels relevant to you, please do talk to someone, and if you're struggling, please reach out to your GP, to someone you trust, or to a crisis line if you need one right now.
• 14:50
  You can find Sirona Health and book your appointment at sironahealth.co.uk.
• 14:55
  See you next time