Oestrogen Is a Longevity Hormone, Not Just a Reproductive One

by Rebecca Prade | Jun 26, 2026 | WELLBEING

Most women are taught that oestrogen is about periods and fertility. That it does its job during the reproductive years, then politely bows out at menopause.

That framing is not just incomplete. It’s the reason so much avoidable decline gets written off as “just ageing.”

Oestrogen is a whole-body hormone. It works in your brain, your bones, your blood vessels, your muscles and your metabolism. When it falls, those systems feel it. Understand that, and perimenopause stops looking like an ending and starts looking like a window, one you can do a great deal with.

Where oestrogen actually works

Oestrogen receptors aren’t confined to the reproductive organs. They sit throughout the body, which is why a single hormone has such reach.

In the brain, oestrogen is neuroprotective. It supports healthy connections between neurons, dampens inflammation and helps the brain clear waste proteins. This is part of why brain fog, low mood and memory wobbles arrive so often in perimenopause and why they’re a signal, not a character flaw.

In the heart and blood vessels, it keeps vessel walls flexible and supports a healthier cholesterol balance. There’s a well-known clue here: women tend to develop heart disease around a decade later than men. That gap closes after menopause. Oestrogen was doing quiet protective work all along.

In the bones, oestrogen restrains the natural breakdown that bone constantly undergoes. When it drops, that breakdown speeds up. Bone loss accelerates sharply in the years around menopause, which is why this stage is the moment to act on bone, not a decade later.

In muscle and metabolism, oestrogen supports how your body builds and repairs muscle and how it handles blood sugar. Its decline is one reason body composition shifts and the middle becomes harder to manage, even when nothing about your effort has changed.

One hormone. Five systems. That is why losing it is felt everywhere at once.

What perimenopause really is

Perimenopause is not the day your periods stop. It’s the often turbulent years before, when oestrogen and progesterone no longer rise and fall in a predictable rhythm.

I’m 49 and in the middle of it, so I say this as someone living the work, not just describing it. The fluctuations are real. The fatigue, the disrupted sleep, the shorter fuse, none of it is imagined. It is biology.

But here is the reframe I come back to. The decline of oestrogen is not something to dread passively. It is something to respond to deliberately. The symptoms are information. They tell you which systems need support, and they tell you now, while there’s most to gain.

Slowing the curve

You can’t stop your ovaries ageing. You can absolutely influence how steeply the rest of you ages alongside them.

Protect muscle and bone with resistance training. This is non-negotiable in midlife. Lifting weights is the single most evidence-based thing you can do to preserve bone density and muscle, steady blood sugar and support hormonal health. Two or three sessions a week, gradually adding more load over time.

Steady your blood sugar. Stable glucose takes pressure off the whole hormonal system. The shifts that come with falling oestrogen make this more important, not less.

Calm the stress load. Chronic stress and falling oestrogen pull in the same unhelpful direction. Sleep, nervous-system care and genuine recovery aren’t luxuries here, they’re part of the protocol.

Get informed about HRT, properly. Replacing oestrogen is an increasingly well-supported option, and the evidence on timing is striking: the protective effects on heart, brain and bone appear strongest when oestrogen is replaced earlier in the transition rather than years later. So here is what’s worth knowing. The fear most women carry about HRT traces back to one study from the early 2000s, using older oral and synthetic hormones, that was widely misreported and the science has moved a long way since. Modern transdermal oestrogen, absorbed through the skin, carries a lower risk profile than those older oral forms. Knowing this changes the conversation. You walk in able to ask for what you want, rather than hoping it’s offered. This is your body and your decades ahead, and informed is the position of power.

Oestrogen is not a fertility footnote. It is a longevity hormone, and its decline touches your brain, heart, bones and metabolism at the same time.

That sounds daunting until you flip it. Because it means the steps that support one system tend to support them all. Strength, stable blood sugar, real rest, and an informed conversation about your hormones, these compound.

I feel better now than I did ten years ago. Not because the biology paused for me, but because I stopped treating midlife as a slow surrender and started treating it as something to optimise. That option is open to you too.

If you’d like the practical version of all this, how to actually eat, move and support your hormones through perimenopause, that’s what I share with my email list, and you can join below.

And if you want to understand your own hormonal picture rather than guess at it, that’s the work I do with clients directly. Knowing what’s happening is the first step to working with it.

This article is for education, to help you make informed choices about your own body and ask better questions.

Join my mailing list and get access to my 5 Essential Steps to Optimise Your Health here!

PCOS Is Now PMOS: What the New Name Tells You About Your Hormones

by Rebecca Prade | Jun 11, 2026 | WELLBEING

For decades, women were handed a diagnosis that pointed at the wrong organ.

Polycystic ovary syndrome. The name put the spotlight on the ovaries and on “cysts.” Both were misleading. As of this year, that name has officially changed — and the change matters far more than it first appears.

In May 2026, after a global consensus process, the condition previously known as polycystic ovary syndrome was renamed polyendocrine metabolic ovarian syndrome, or PMOS. The new name was published in The Lancet on 12 May 2026, following more than a decade of debate and input from tens of thousands of patients, clinicians and researchers across 56 organisations.

This is not a rebrand. It is a correction. And if you have ever been told you have PCOS, it changes the question you should be asking.

The cysts were never the problem

Here is the detail that undoes the old name. The “cysts” seen on an ultrasound are not pathological cysts at all, they are arrested follicles, eggs that started to develop and stalled. You do not even need them to have the condition. 

So the original name described a symptom that isn’t reliably present, on an organ that isn’t the root cause. No wonder it confused everyone, including the women living with it.

The cost of that confusion was real. Diagnostic delay affected up to 70% of people with the condition, and care was often fragmented across specialists who each saw only their corner of it. You can’t treat a whole-body condition one symptom at a time.

What PMOS actually means

The new name does something useful. It names the mechanism Polyendocrine,  many hormones are involved, not one. Insulin, androgens like testosterone, and the brain’s signalling hormones all interact. Metabolic, this is, at its core, a condition of how your body handles energy. Ovarian, the ovaries are affected, but they are downstream, not the origin.

In other words: PMOS is a metabolic and hormonal condition that happens to show up in the ovaries. It is not a gynaecological problem with metabolic side effects. The order matters, because it tells you where to intervene.

The thread that runs through it: insulin

In clinic, I see the same pattern again and again. A woman has been told her irregular cycles, her acne, the stubborn weight around her middle, the unwanted hair growth, these are separate problems. They are not. They are usually the visible end of one process: insulin resistance.

When cells stop responding well to insulin, the body produces more of it. High insulin drives the ovaries to make more testosterone. Excess testosterone disrupts ovulation, alters the skin and hair, and the cycle becomes erratic. The weight gain isn’t a willpower failure. It is a hormonal signal.

This is why two women can both have PMOS and look completely different. One is slim with regular-ish cycles and high androgens. Another carries weight and has stopped ovulating altogether. Same underlying driver, different presentation. Insulin resistance, by the way, is common even in women who are not overweight, which is exactly why the old “lose weight and come back” advice failed so many.

Why your blood tests came back “normal”

This is the part that frustrates my clients most. They’ve been to the GP. The standard bloods looked fine. They were sent away reassured, still exhausted, still not ovulating, still not themselves.

A standard panel measures a single moment. It rarely captures how testosterone is being produced and cleared, how insulin is behaving across a day, or how the stress response is feeding into the whole picture. “Your results are normal” and “your hormones are working well” are not the same sentence. They never were.

This is where functional testing earns its place. Mapping androgens, insulin and cortisol together, rather than glancing at one number in isolation, is what turns a vague label into a specific, workable plan.

The genuinely hopeful part

Here is what I want you to take from the name change. PMOS is metabolic. And metabolic processes respond.

This is not a fixed sentence written into your genes. It is a pattern you can shift, through the way you eat to steady blood sugar, the way you train to improve insulin sensitivity, the way you manage the stress that quietly pushes the whole system in the wrong direction. 

Resistance training in particular does more for insulin sensitivity than almost anything else, and it costs nothing but consistency.

I won’t pretend it is effortless. But “workable” is the honest word, and it is a far better word than the resignation so many women were handed alongside the old diagnosis.

The renaming of PCOS to PMOS is, in the end, an invitation. An invitation to stop chasing isolated symptoms and start asking a better question: what is driving all of this at once?

That is the question worth answering.

If you’d like the deeper guide to steadying blood sugar and supporting your hormones day to day, it’s the kind of thing I share with my email community, you can join below.

And if you suspect PMOS is part of your picture and you’re tired of being told you’re fine, this is exactly the work I do with clients one to one. Mapping the full hormonal and metabolic picture is where we start. Book a discovery call

This article is for education and isn’t a substitute for personalised medical care.

Join my mailing list and get access to my 5 Essential Steps to Optimise Your Health here!