PCOS and Perimenopause: Why Your Symptoms May Change and What You Can Do
Understanding how PCOS and perimenopause overlap, why symptoms can change and the nutrition and lifestyle habits that may help.
Have you reached your late 30s or 40s and started wondering if your PCOS has changed?
Perhaps your periods have become less predictable.
You're sleeping less well.
Your weight seems harder to manage than it used to be.
You're waking up tired, struggling with brain fog or finding your usual routine no longer works.
Many women begin asking themselves:
"Is this still PCOS… or am I starting perimenopause?"
The answer is often both.
Perimenopause is a natural stage of life that happens before menopause, when hormone levels begin to fluctuate and the ovaries gradually produce less oestrogen.
For women with PCOS, this transition can sometimes feel particularly confusing because many symptoms overlap.
Understanding what's happening can help you make sense of these changes and focus on the habits that continue to support your health during this next stage of life.
You may also find my PCOS Symptoms and Hormonal Imbalance guide helpful if you're unsure which symptoms are related to PCOS.
What is perimenopause?
Perimenopause is the transition leading up to menopause.
It often begins during a woman's 40s, although some women notice changes earlier or later.
During this time, hormone levels fluctuate from month to month.
Periods may become:
Less regular.
Closer together.
Further apart.
Heavier or lighter than usual.
Eventually, periods stop altogether.
Menopause is confirmed after 12 consecutive months without a menstrual period.
Every woman's experience is different.
Some notice only subtle changes, while others experience symptoms that have a much greater impact on daily life.
How is perimenopause different if you have PCOS?
One of the biggest challenges is that many symptoms of PCOS and perimenopause look very similar.
Both can be associated with:
Fatigue.
Weight changes.
Mood changes.
Sleep difficulties.
Irregular periods.
Changes in blood sugar regulation.
This can make it difficult to know what's driving your symptoms.
Some women also notice that symptoms they've managed successfully for years suddenly become more difficult to control.
That doesn't necessarily mean you're doing anything wrong.
It often reflects the natural hormonal changes taking place during perimenopause.
What I see in clinic
One of the most common things I hear is:
"I finally felt like I understood my PCOS… and now everything seems to have changed."
Women often tell me that the habits which previously worked no longer seem to have the same effect.
Perhaps weight is increasing despite eating similarly.
Energy levels have dropped.
Sleep has become lighter and more disrupted.
Cravings have returned after years of feeling in control.
This can feel incredibly frustrating.
But it doesn't mean you've failed.
It usually means your body has entered a new stage that requires a slightly different approach.
Feeling like your body has changed?
If you've reached your 40s and feel as though your usual routine isn't working anymore, you're not alone.
Many women with PCOS tell me they're struggling with increasing cravings, lower energy and weight that feels harder to manage than it used to.
That's exactly why I created my Free 10-Day Evening Cravings Reset.
Inside a supportive WhatsApp community, I'll guide you through one simple nutrition habit each day to help you:
Build balanced meals that support steady energy.
Reduce evening cravings.
Feel fuller for longer.
Improve blood sugar balance.
Create realistic habits that fit around busy life.
It's free, practical and designed to help you build strong foundations—whatever stage of life you're in.
Why symptoms often change during perimenopause
As hormone levels begin to fluctuate, many women notice changes that affect everyday life.
These may include:
Feeling more tired.
Increased abdominal weight gain.
Changes in appetite.
More frequent sugar cravings.
Lower motivation to exercise.
Poorer sleep.
Brain fog.
Mood changes.
Not every woman experiences every symptom.
Some women notice only one or two changes, while others experience several at the same time.
The important thing to remember is that these symptoms are influenced by much more than hormones alone.
Sleep, stress, nutrition, muscle mass and physical activity all continue to play an important role.
Blood sugar still matters
One of the biggest misconceptions I hear is:
"Now I'm approaching menopause, there's nothing I can do."
In reality, many of the nutrition principles that support PCOS remain just as important during perimenopause.
Supporting healthy blood sugar balance can continue to help with:
Energy.
Fullness after meals.
Cravings.
Sustainable weight management.
Rather than following restrictive diets, I encourage women to focus on:
Regular meals.
Protein with each meal.
Plenty of vegetables.
Fibre-rich carbohydrates.
Healthy fats.
These habits continue to provide a strong foundation throughout perimenopause.
Learn more about supporting blood sugar in PCOS Weight Gain Support.
Muscle becomes even more important
One of the biggest changes during midlife is the gradual loss of muscle mass that naturally occurs with age.
Muscle plays an important role in:
Everyday strength.
Balance.
Bone health.
Blood sugar regulation.
Metabolic health.
This is one reason why strength-based exercise and adequate protein become increasingly important during your 40s and beyond.
The goal isn't to spend hours in the gym.
Simple resistance exercises performed consistently can make a meaningful difference over time.
Read How Much Protein Do You Really Need With PCOS? for practical guidance on building protein into your meals.
Sleep affects everything
Sleep is one of the areas many women notice changing first.
Perhaps you're waking during the night.
Finding it harder to get back to sleep.
Or waking feeling as though you've hardly rested at all.
Poor sleep doesn't just affect energy.
It can also influence:
Hunger.
Cravings.
Concentration.
Mood.
Motivation to prepare healthy meals or exercise.
Although improving sleep isn't always straightforward during perimenopause, building consistent daily routines can still make a positive difference.
You may also enjoy PCOS Fatigue: Nutrients and Eating Habits That Support Better Energy, which explores the relationship between sleep, nutrition and energy.
Looking after yourself differently
Many women spend years trying to work harder.
Eat less.
Exercise more.
Push through tiredness.
Perimenopause often teaches us that this approach isn't sustainable.
Instead, it's a time to ask:
"How can I support my body rather than fight against it?"
That might mean:
Prioritising recovery.
Eating enough protein.
Protecting your sleep where possible.
Building strength.
Planning meals ahead during busy weeks.
Being kinder to yourself when life feels demanding.
Supporting your health during perimenopause isn't about perfection.
It's about adapting your habits to meet your body's changing needs.
Remember...
Perimenopause doesn't mean your healthy habits stop working.
It means they become even more valuable.
The women who tend to feel most confident during this stage aren't usually following extreme diets or constantly changing their routine.
They're focusing on simple habits they can repeat consistently.
Those habits continue to support their health long after the menopause transition is complete.
Nutrition strategies that continue to support your health
There's no single diet for perimenopause, just as there's no single diet for PCOS.
Instead, the focus is on building eating habits that support your changing hormones, energy levels and long-term health.
Small, consistent habits are usually far more effective than trying another restrictive diet every few months.
Here are the areas I encourage women to focus on most:
Prioritise protein at every meal
As we get older, maintaining muscle becomes increasingly important.
Muscle helps support:
Strength and mobility.
Blood sugar regulation.
Bone health.
Healthy ageing.
Everyday energy.
Including a good source of protein with each meal can also help you feel fuller for longer, making it easier to manage hunger and reduce afternoon or evening energy dips.
Good protein choices include:
Eggs.
Greek yoghurt.
Cottage cheese.
Fish.
Chicken and turkey.
Tofu and tempeh.
Lentils and beans.
Edamame.
Lean meat.
Rather than trying to dramatically increase your protein overnight, simply ask yourself:
"Where is the protein in this meal?"
Small improvements at breakfast and lunch often make a noticeable difference.
If you need some inspiration this article has some delicious 30g High-Protein Meal Ideas for PCOS with Easy Breakfasts, Lunches and Dinners.
Don't forget fibre
Fibre supports much more than digestive health.
A diet rich in fibre may help support:
Healthy blood sugar balance.
Gut health.
Fullness after meals.
Heart health.
Aim to include a variety of plant foods throughout the week, such as:
Vegetables.
Fruit.
Oats.
Wholegrains.
Beans and lentils.
Nuts and seeds.
There's no need to count every gram.
Instead, think about adding an extra portion of plants to your meals wherever you can. Learn more about the role of Fibre for PCOS and Why It Matters for Cravings, Gut Health, Energy and Hormone Balance.
Calcium and bone health
During perimenopause and after menopause, bone health becomes increasingly important as oestrogen levels decline.
Calcium-rich foods include:
Milk.
Natural and Greek yoghurt.
Cheese.
Calcium-set tofu.
Fortified plant-based alternatives.
Tinned sardines with bones.
Weight-bearing and resistance exercise also play an important role in maintaining strong bones.
Nutrition and movement work best together.
Healthy fats still have an important role
Healthy fats help make meals satisfying and provide nutrients that support overall health.
Good choices include:
Olive oil.
Avocados.
Walnuts.
Almonds.
Pumpkin seeds.
Chia seeds.
Ground flaxseed.
Oily fish.
Rather than avoiding fat, focus on including moderate amounts of healthy fats as part of balanced meals.
Movement changes too
Perimenopause isn't the time to punish yourself with more exercise.
Instead, it's about choosing movement that supports your body.
I encourage women to think about three different types of activity:
Strength training
This helps support muscle mass, bone health and metabolic health.
Everyday movement
Walking, gardening, taking the stairs or simply moving more during the day all count.
Activities you enjoy
Swimming, cycling, dancing, yoga or Pilates are all valuable if they're activities you'll continue doing consistently.
The best exercise plan is the one that fits realistically into your life.
Stress deserves just as much attention
Many women reach perimenopause while juggling demanding careers, teenagers, ageing parents or other caring responsibilities.
It's hardly surprising that stress levels can feel higher than ever.
While we can't remove every source of stress, we can support how we respond to it.
That might include:
Taking a proper lunch break.
Spending time outdoors.
Saying no when your schedule is already full.
Protecting time for rest.
Asking for support when you need it.
Looking after yourself isn't selfish.
It's part of looking after your long-term health.
Could supplements help?
Supplements may be appropriate for some women, but they shouldn't be the first step.
Before considering supplements, it's worth asking:
Am I eating regular, balanced meals?
Am I getting enough protein?
Is my diet varied?
Am I sleeping well?
Have I had appropriate blood tests if I'm concerned about deficiencies?
Depending on your individual circumstances, your GP or healthcare professional may recommend supplements such as vitamin D or other nutrients where appropriate.
The aim is to choose supplements for a clear reason rather than simply because they're popular.
Read my PCOS Supplements Guide to understand when supplements may be appropriate and how to choose them wisely.
When should you speak to your GP?
Although many changes are a normal part of perimenopause, it's important not to assume every symptom is caused by hormones.
Speak to your GP if you experience:
Very heavy or prolonged bleeding.
Bleeding after sex.
Bleeding after menopause.
Severe fatigue.
Ongoing low mood.
Symptoms that are affecting your daily life.
Any symptoms that concern you.
Your GP can help assess whether further investigations or treatment may be appropriate.
What I see in clinic
The women who cope best with this stage of life aren't usually the ones following the strictest diet.
They're the women who've learned to adapt.
Instead of trying to eat less and exercise more, they begin focusing on:
Building balanced meals.
Preserving muscle.
Prioritising sleep.
Managing stress.
Being more consistent rather than more perfect.
That shift often brings a huge sense of relief.
Rather than fighting their changing body, they start working with it.
Looking ahead with confidence
Perimenopause marks the beginning of a new chapter, not the end of feeling healthy.
Although your body may respond differently than it did in your twenties or thirties, there is still so much you can do to support your wellbeing.
The habits that matter most aren't extreme.
They're the simple things you can repeat consistently:
Nourishing meals.
Regular movement.
Good-quality sleep.
Building strength.
Looking after your mental wellbeing.
Asking for support when you need it.
These habits don't just support you through perimenopause.
They continue to benefit your health for many years to come.
If you've been feeling as though your PCOS has suddenly changed, you're not imagining it.
Perimenopause can bring new challenges, but it also offers an opportunity to rethink how you care for your body.
Instead of chasing quick fixes or restrictive diets, focus on building habits that support your changing needs.
You don't have to do everything perfectly.
Small, consistent changes are often the ones that make the biggest difference over time.
The goal isn't simply to get through perimenopause.
It's to feel strong, confident and well as you move into the next stage of life.
Learn more about my Hormone Shift Method if you'd like tailored nutrition and lifestyle support for PCOS.
Frequently Asked Questions
Can you have PCOS and perimenopause at the same time?
Yes.
PCOS doesn't disappear when you reach your 40s. During perimenopause, hormonal changes can overlap with existing PCOS symptoms, making it more difficult to know what's causing changes such as fatigue, weight gain or irregular periods.
Does PCOS get better after menopause?
Some symptoms, such as acne or excess hair growth, may improve as androgen levels change with age. However, concerns such as insulin resistance, cholesterol, blood pressure and cardiovascular health may still need attention after menopause.
Why am I gaining weight during perimenopause?
Weight changes during perimenopause can be influenced by several factors, including hormonal changes, reduced muscle mass, lower physical activity, poor sleep, stress and changes in appetite. Rather than focusing on eating less, building muscle and eating balanced meals often becomes increasingly important.
Is strength training important during perimenopause?
Yes.
Strength training helps support muscle mass, bone health and metabolic health. It doesn't have to involve heavy gym sessions—even short, regular resistance exercises can be beneficial.
Should I take supplements during perimenopause?
Not necessarily.
Some women may benefit from supplements depending on their diet, symptoms or blood test results, but supplements should support—not replace—a balanced diet and healthy lifestyle.
When should I speak to my GP?
Speak to your GP if you're experiencing very heavy bleeding, bleeding after menopause, severe fatigue, persistent low mood or any symptoms that are affecting your quality of life or causing concern.
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You don't have to navigate this stage on your own
If your PCOS symptoms have changed during your late 30s or 40s, it doesn't mean you've failed or that nothing will help.
Often, it simply means your body needs a different approach.
Supporting your health through perimenopause isn't about following a stricter diet or trying to control every hormone.
It's about building sustainable habits that continue to support your energy, muscle health, blood sugar balance and overall wellbeing.
If you'd like practical guidance and ongoing support, my Free 10-Day Evening Cravings Reset is a great place to start.
You'll learn simple strategies that can help you feel more confident around food and create habits that continue long after the 10 days are over.
Disclaimer: The information provided is for educational and informational purposes only and should not be considered medical advice. While I provide guidance based on my expertise as a BANT registered nutritionist and health coach, all health-related decisions should be made in consultation with your GP, specialist, or healthcare provider. Any changes to medication, supplements, or treatment plans should only be made under the supervision of a qualified medical professional. The suggestions outlined are intended to support general well-being and do not replace medical treatment or diagnosis. Always consult a healthcare professional before making significant lifestyle or dietary changes.
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