Insulin Resistance and Inflammation: Why Would These PCOS Causes Exist?
It’s a powerful question: why would the body create conditions that end up harming us — conditions that can even shorten our lives?
As counterintuitive as it seems, what now drives so much metabolic distress once helped our ancestors survive.
Survival Mechanisms, Not Malfunctions
Thousands of years ago, the threats we faced weren’t supermarket snacks or all-night screen time — they were infections, wounds, and famine. The body evolved ingenious systems to meet those challenges.
Take inflammation, for example. Imagine a deep bite from a sabre-toothed predator. Those teeth carried lethal bacteria, and infection was often deadly. Inflammation allowed our immune system to unleash a powerful internal army — fever to slow pathogen growth, swelling to block spread, and immune cells to neutralise invaders. Pain and redness were the body’s way of saying: “Stop, rest, and heal.”
Inflammation wasn’t the problem — it was the solution.
But the same fire that saved us from ancient infections now smoulders constantly inside many modern bodies.
Insulin Resistance: A Metabolic Life Jacket
Now, imagine a long winter with scarce food supplies. Those who could become temporarily insulin-resistant had a survival advantage. Insulin resistance allowed glucose to remain available in the blood for the brain — our most energy-hungry organ — while conserving fat for lean times. It was a biological life jacket, preventing starvation when calories were scarce.
In short bursts, insulin resistance and inflammation kept our ancestors alive.
However, in our current environment — with constant stress, processed foods, and insufficient movement — these protective systems never shut off.
From Protection to Problem
Our biology still thinks famine and infection are always just around the corner, but instead of cycles of scarcity and rest, it now faces an endless feast and a constant state of alert. The defence systems meant to operate for days or weeks are now switched on for years.
The result?
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Chronic inflammation that silently damages tissues.
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Persistent insulin resistance that drives fatigue, weight gain around the middle, and reproductive challenges is common in PCOS.
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Hormonal chaos that confuses the body’s natural rhythms.
It’s a bit like sweating — a short-term cooling mechanism that’s lifesaving in the right moment. But if you never stopped sweating, you’d dehydrate, lose vital salts, and eventually collapse. What keeps you safe in the short term becomes dangerous when it never turns off.
Our Bodies Are Ancient, But Our World Is New
Researchers such as Fernández-Real and Ricart described insulin resistance and inflammation as “good adaptations to the environment or maladaptations of actual lifestyle to our genome.” That’s key. Our genes were shaped in a world of movement, fasting, and natural foods, yet we now live in one of constant sitting, snacking, and stress.
It’s not that our bodies are broken — they’re simply out of context.
What You Can Do to Restore Balance
The exciting truth is that insulin resistance and inflammation are reversible.
Small daily shifts in how you eat, move, and manage stress can quietly reprogram your body’s signalling systems back to health.
Here are a few ways to start:
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Eat in cycles that allow rest from insulin production – favour whole foods, lower-glycemic meals, and overnight fasting windows.
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Move often – even brief activity increases insulin sensitivity and calms inflammatory pathways.
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Manage hidden stress – meditation, spending time in nature, or getting good sleep all help reduce inflammatory hormones.
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Nourish your gut – fermented foods and fibre support a microbiome that naturally reduces inflammation.
These aren’t hacks—they’re reminders of the rhythms the body was designed for.
A Final Thought
Your body isn’t fighting you. It’s doing its best to protect you with an ancient toolkit built for a very different world. Once we understand that, we can help it return to balance — improving fertility, energy, metabolism, and wellbeing in the process.
To learn more about practical strategies for quelling insulin resistance naturally. Understanding the “why” behind your symptoms is the first step toward transforming them.
From PCOS to perfect health, with love,
Dr. Rebecca Harwin
The PCOS Expert
Chiropractor & Bestselling Author of
Conquer Your PCOS Naturally
www.ConquerYourPCOSNaturally.com
P.S. Feel free to share this on social media or via email. We need to share this information to help others with Polycystic Ovary Syndrome.
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