Perimenopause Is Not Just Hot Flushes: What Is Really Happening and How to Feel Like Yourself Again
By Kylie Sartori | Kylie Sartori Naturopathy, Spotswood Melbourne
Something shifts in your forties and it is hard to name at first. You are more tired than you used to be, but it is a different kind of tired. Sleep is lighter, or broken, or you wake at 3am with your mind already running. Your patience is shorter. Your weight is redistributing in ways that feel unfamiliar. You feel anxious in situations that never used to bother you, or flat in a way you cannot quite explain. Your periods might be changing, coming earlier, heavier, or less predictable than they have been for years.
And underneath all of it is a quiet, persistent question: is this just what getting older feels like?
It is not. What most people do not realise is that perimenopause is a significant hormonal transition that affects almost every system in the body, and the way it is managed in those years matters enormously for how you come out the other side.
What Is Actually Happening
Perimenopause is the years leading up to menopause, when oestrogen and progesterone begin to fluctuate and gradually decline. This transition can begin anywhere from the late thirties to the mid-forties and typically lasts several years before periods stop entirely.
The hormonal shifts of perimenopause do not happen in a straight line. Oestrogen can surge and drop erratically before it begins its longer decline, which is why symptoms can feel unpredictable and inconsistent. Progesterone tends to fall first and more steeply, which changes the balance between the two hormones and drives many of the earliest symptoms, disrupted sleep, heightened anxiety, heavier periods, and increased sensitivity to stress.
At the same time, the relationship between these hormones and cortisol becomes more fraught. As the sex hormones decline, the adrenal glands are asked to take on more of the hormonal load. If those adrenal glands are already depleted from years of stress, poor sleep, and running on empty, this transition hits much harder.
Why This Life Stage Hits So Hard for So Many Women
Perimenopause does not arrive in isolation. For most women, it coincides with one of the most demanding periods of life. Children who still need a great deal, ageing parents who need more, careers at a point of real pressure, and the accumulated weight of years of prioritising everything and everyone ahead of their own recovery.
The body that enters perimenopause is the body that has been living that life. What was manageable before, pushing through on less sleep, skipping meals, running on adrenaline, becomes significantly harder when the hormonal buffer that was quietly supporting everything starts to shift.
This is why the symptoms of perimenopause are not just about hormones in isolation. They are the intersection of hormones, adrenal function, gut health, thyroid function, and the cumulative load the body has been carrying. Addressing it well means looking at all of those things together.
What the Symptom Picture Can Include
The most commonly known symptoms are hot flushes and night sweats, but clients frequently mention that those are not actually what bothers them most. The symptoms that affect quality of life most significantly tend to be the ones that are less often connected to perimenopause at all.
These include sleep that is light, broken, or unrefreshing, waking between 2am and 4am with difficulty returning to sleep, anxiety or low mood that feels disproportionate or comes from nowhere, brain fog and difficulty concentrating or finding words, fatigue that does not improve with rest, weight gain particularly around the abdomen, changes to periods including heavier bleeding, shorter cycles, or increased cramping, joint aches, dry skin, hair thinning, low libido, and a general sense of feeling unlike yourself.
The breadth of that list reflects the fact that oestrogen receptors are found throughout the brain, gut, cardiovascular system, bones, skin, and immune system. When oestrogen fluctuates, the effects ripple across all of those systems at once.
The Gut Connection
One of the most underappreciated aspects of perimenopause is what happens to the gut microbiome. Oestrogen plays a direct role in regulating the gut microbiome, and as levels shift, the diversity and balance of gut bacteria shifts with them. This affects digestion, immune function, mood, and how the body processes and clears oestrogen itself.
The estrobolome, the collection of gut bacteria involved in oestrogen metabolism, determines how effectively used oestrogen is cleared from the body through the bowel. When the microbiome is disrupted, oestrogen can be reactivated and recirculated rather than eliminated, which contributes to symptoms of oestrogen excess alongside the symptoms of oestrogen deficiency. It is a more complicated picture than simply low oestrogen, which is part of why treatment needs to be specific to the individual.
You can read more about gut health and how I approach testing and treatment on my functional testing page.
Supporting the Body Through This Transition
The foundation
What you eat, how you sleep, and how you manage your stress load all have a direct and measurable impact on how your hormones behave during perimenopause. This is not a disclaimer before the supplements list. It is the most important part of the picture.
Protein at every meal supports muscle mass, blood sugar stability, and the production of neurotransmitters that regulate mood and sleep. Phytoestrogen-rich foods like flaxseeds, legumes, and wholegrains provide a gentle oestrogenic effect that can help buffer some of the volatility of declining oestrogen. Fibre feeds the gut bacteria involved in oestrogen clearance. Reducing sugar and alcohol makes a significant difference to hot flushes, sleep quality, and mood in many women, more than they expect.
Protecting sleep is not optional at this stage. The repair and hormonal recalibration that happen during deep sleep are exactly what the perimenopausal body needs most, and the habits that disrupt it, screens late at night, alcohol, eating too close to bed, work stress brought into the bedroom, have an outsized impact during this transition.
Herbal medicine
This is where naturopathic support offers something genuinely distinct. Adaptogenic herbs including withania, rhodiola, and Siberian ginseng work on the HPA axis to regulate the cortisol response, build resilience to stress, and support sustained energy without overstimulation. These are particularly useful where the adrenal piece is significant.
For sleep, passionflower and ziziphus are well supported clinically for promoting restful sleep and reducing the nighttime waking that is so common in perimenopause. For hot flushes and hormonal volatility, sage and black cohosh have a strong evidence base. Chaste tree supports progesterone pathways and is useful particularly in early perimenopause where progesterone decline is driving symptoms before oestrogen has dropped significantly.
Targeted nutritional support
Magnesium is essential for sleep quality, nervous system regulation, and reducing the muscle tension and headaches that many women experience in perimenopause. It is also depleted rapidly by stress and alcohol, two things that are often more present during this life stage. B vitamins, particularly B6 and B12, support hormone metabolism, neurotransmitter production, and energy at a cellular level. Vitamin D and calcium together support bone density, which begins to decline more rapidly as oestrogen falls. Selenium and iodine support thyroid function, which is frequently affected during the perimenopausal years. Zinc supports hormone balance and immune function.
The right combination depends entirely on the individual picture, which is why I use functional testing to guide treatment rather than starting with a general supplement protocol.
What Testing Can Tell Us
Understanding exactly where someone is in the hormonal transition, how their cortisol is patterning across the day, how their thyroid is functioning, and what is happening in their gut gives us a clear starting point rather than a best guess. A DUTCH hormone test maps oestrogen, progesterone, cortisol, and their metabolites in detail. A comprehensive stool test shows us the state of the estrobolome and gut microbiome. Thyroid and nutrient panels complete the picture.
From that information, treatment is targeted and phased rather than generic, and we can measure progress as we go.
Working Together
Perimenopause is a transition, not a decline. How supported the body is during these years shapes how women come through to the other side, and there is a great deal that can be done to make this period feel manageable rather than overwhelming.
If you are in your late thirties or forties and recognising yourself in this post, it is worth getting a clear picture of what is actually happening rather than waiting for symptoms to worsen.
I see clients in person at my clinic in Spotswood, Melbourne, and via telehealth for those across Australia. You can also read more about the conditions I work with on my conditions treated page.
Frequently Asked Questions About Perimenopause
How do I know if I am in perimenopause? Perimenopause is a clinical diagnosis based on symptoms and age rather than a single test result. Changes to your menstrual cycle, particularly shorter cycles, heavier periods, or increased PMS, alongside symptoms like disrupted sleep, mood changes, and new anxiety, in a woman in her late thirties or forties are often the earliest indicators. Hormone testing can provide useful context but a single oestrogen or FSH reading is not always definitive given how much hormones fluctuate during this transition.
Can perimenopause cause anxiety and depression? Yes, and it is significantly underrecognised. The decline in progesterone, which has a calming effect on the nervous system via GABA receptors, is often the first hormonal shift of perimenopause and can drive anxiety, low mood, and sleep disruption before any other symptoms appear. For some women this is the primary presentation, and it is frequently misattributed to life stress or treated as a standalone mental health issue without the hormonal context being considered.
Does gut health really affect perimenopause symptoms? More than most people realise. The estrobolome, the community of gut bacteria involved in oestrogen metabolism, directly affects how oestrogen is processed and cleared from the body. A disrupted microbiome can impair oestrogen clearance, contribute to oestrogen recirculation, and affect mood, digestion, and immune function during this transition. Addressing the gut is often a foundational part of perimenopause support.
Is HRT the only option? No. Hormone replacement therapy is an appropriate choice for some women and worth discussing with your GP, particularly where symptoms are severe. For many women, naturopathic support provides meaningful relief and addresses the underlying picture in a way that HRT alone does not. The two approaches are not mutually exclusive and can complement each other well. What matters most is that you are making an informed choice based on your individual situation rather than simply riding it out without any support at all.
What is the difference between perimenopause and menopause? Menopause is defined as 12 consecutive months without a period, typically occurring between the ages of 45 and 55. Perimenopause is the transition leading up to that point, which can last anywhere from two to ten years. Most of the symptoms associated with menopause actually begin during perimenopause, which is why early support during the perimenopausal years makes a significant difference to how that transition unfolds.
Kylie Sartori is a degree-qualified naturopath based in Spotswood, Melbourne, specialising in gut health, hormonal health, perimenopause, and family wellbeing. She offers in-person consultations at her Spotswood clinic and telehealth appointments for clients across Australia.
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