The Snowball Effect: How Blood Sugar Dysregulation Quietly Takes Over
And why understanding your body’s rust is the first step to getting back on the road
Most people don’t get sick all at once.
They get sick slowly, invisibly, across years — often decades — while feeling broadly fine. A little more tired than they used to be. A little rounder around the middle. A little snappier in the afternoon, a little more dependent on coffee to get going. Blood pressure crept up. The doctor mentioned “borderline” something. They were told to watch their weight.
And then one day, out of nowhere, it wasn’t borderline anymore.
Except it wasn’t out of nowhere. The snowball had been rolling for years. It just got very, very large before anyone noticed.
Where It Begins: The Insulin Resistance Story
Every time you eat — especially carbohydrates — your blood glucose rises. Your pancreas responds by releasing insulin, the key that unlocks your cells to let glucose in for energy. This is normal, elegant, and when it’s working well, you barely notice it.
The problem begins when this system is asked to work too hard, too often.
A diet heavy in refined carbohydrates and sugar, combined with chronic stress, poor sleep, sedentary habits, and excess visceral fat, means your blood glucose is chronically elevated. Your pancreas keeps pumping out insulin to cope. And over time, your cells — saturated with glucose they can’t efficiently use — start ignoring the signal. They become insulin resistant.
Now the pancreas has to shout louder. It produces more insulin to achieve the same result. Blood insulin levels rise. And here is where the snowball begins its descent.
Because elevated insulin is not benign. It drives fat storage, particularly around the abdomen. It promotes inflammation. It dysregulates hunger hormones, making you feel hungry even when you don’t need food. And it begins to compromise the very cells it was designed to serve.
The Cascade Begins
Once insulin resistance takes hold, it rarely stays in isolation. It is a gateway condition — a signal that the body’s regulatory systems are under sustained pressure. And pressure, left unaddressed, finds weaknesses.
Cortisol enters the picture. The physiological stress response was designed for acute threats — run from the predator, the threat passes, cortisol drops. But in modern life, the threats don’t pass. Financial pressure, work demands, poor sleep, blood sugar swings themselves — all of these keep cortisol chronically elevated. And cortisol directly raises blood glucose. It signals the liver to release stored sugar, preparing the body for action that never comes. This feeds the insulin resistance loop: more glucose, more insulin, more resistance, more cortisol signalling, more glucose.
Blood pressure rises. Chronically elevated insulin causes the kidneys to retain sodium and water, and drives arterial stiffness through inflammatory mechanisms. The result is hypertension — often silent, often unattributed to its metabolic roots. The GP prescribes an antihypertensive. The underlying driver continues unchecked.
Prediabetes develops. This is the moment when blood glucose regulation has been so repeatedly overwhelmed that fasting levels, and particularly post-meal spikes, begin to exceed normal thresholds. Most people are told this is a “warning sign” to lose weight and cut sugar. Few are told what is actually happening at a cellular level, or how reversible this stage is — if caught and addressed.
The heart begins to suffer. Chronically elevated glucose damages the endothelium — the delicate lining of blood vessels. Small glycation events accumulate. LDL particles, small and dense in the context of insulin resistance, penetrate arterial walls. Inflammation does its slow, relentless work. Cardiovascular disease is not fundamentally a cholesterol story. It is predominantly a metabolic inflammation story — and blood sugar dysregulation is one of its primary authors.
Cancer risk rises. This is less often spoken about, and it should be. Cancer cells are voracious consumers of glucose — a phenomenon known as the Warburg effect. Chronic hyperinsulinaemia acts as a growth signal, stimulating cellular proliferation through IGF-1 pathways. The inflammatory environment created by metabolic dysfunction suppresses immune surveillance. The body becomes, over time, a less hostile environment for abnormal cell growth. Obesity, type 2 diabetes, and the metabolic syndrome are independently associated with increased risk of multiple cancer types — including breast, colorectal, endometrial, and pancreatic. This is not fringe science. It is in the oncology literature, and it is under-communicated.
For Women: When the Protective Buffer Is Removed
Women have a biological advantage that many don’t know they have — until they lose it.
Oestrogen is profoundly protective of metabolic health. It maintains insulin sensitivity. It supports healthy fat distribution, favouring the periphery over the abdomen. It protects the cardiovascular endothelium. It modulates cortisol. It supports sleep architecture and therefore the overnight fasting period during which metabolic repair occurs.
Then perimenopause begins, often in the early-to-mid forties, sometimes earlier, and oestrogen becomes erratic before it declines. The fluctuations themselves are metabolically disruptive. Sleep deteriorates, often dramatically. Visceral fat begins to redistribute centrally. Insulin sensitivity decreases. The cortisol axis becomes more reactive.
The snowball that may have been rolling slowly — perhaps quietly managed by the body’s own compensatory mechanisms — suddenly hits a steeper slope.
Women in perimenopause and menopause often report that nothing in their diet or lifestyle changed, and yet everything changed in their bodies. Weight accumulates, particularly around the abdomen. Energy becomes unpredictable. Blood pressure edges up. Mood is more volatile, in part because oestrogen supports serotonin synthesis, and in part because blood sugar instability is itself a powerful driver of mood dysregulation.
What’s critical to understand is that this is not an inevitable consequence of ageing. It is an intersection of hormonal transition and a metabolic system that was, perhaps, already under pressure. The hormonal shift removes a buffer. But the underlying terrain — the diet, the stress load, the sleep, the inflammatory status of the gut, determines how steep that slope becomes.
Women who arrive at perimenopause metabolically resilient weather it differently. The transition is real, but it need not be a cliff edge.
For Men: The General Lee Problem
Now here’s where we need to talk about a car.
If you know the General Lee — the 1969 Dodge Charger from The Dukes of Hazzard — you’re probably old enough to need this conversation. That’s not an insult. It’s a clinical observation.
The General Lee was magnificent. A powerful engine, iconic bodywork, bold orange paint you could see from a mile away. It jumped bridges and outran corrupt sheriffs and never seemed to break down, no matter what it was put through.
But here’s the thing about classic cars. They need maintenance. The engine needs oil changes, coolant flushes, timing checks. The bodywork needs treating against moisture and corrosion. The tyres need replacing before the rubber wears through to the wire. And if you neglect any of this — especially if the car sits in a damp garage for years looking magnificent from the outside — the rust begins inside. In the engine block. In the undercarriage. In the joints and bearings and places you can’t see without getting underneath.
Men’s metabolic decline often looks exactly like this.
The bodywork may still look reasonable. Or perhaps more accurately, the bodywork starts to go too — the spare tyre around the middle, the increasing fatigue, the blood pressure medications — but often the internal rusting has been underway long before there were visible signs. Testosterone, like oestrogen, is metabolically protective. It supports muscle mass and insulin sensitivity. And visceral fat — the metabolically active fat that accumulates around the organs in men who are insulin resistant — is itself an endocrine disruptor. It converts testosterone to oestrogen through aromatisation, further reducing the androgenic protection, which further reduces muscle mass, which further reduces insulin sensitivity.
It is a slow rust. Quiet, internal, progressive.
The engine — the cardiovascular system, the metabolic architecture, the hormonal signalling — can seize. Not because the man was weak, or unlucky, or genetically condemned. But because the oil wasn’t changed, the hammerite wasn’t applied, and no one thought to look underneath while the paintwork still looked passable.
The tragedy of men and metabolic disease is not the disease itself. It is the preventability of it. And the silence around it.
Putting Out Fire with Gasoline
David Bowie knew something about tension and release. In Cat People (Putting Out Fire), he gave us one of the most viscerally perfect lines in rock music: putting out fire with gasoline.
I think about that line regularly in clinical practice.
Because when people are living with chronic inflammation — with the smouldering, low-grade systemic fire of insulin resistance, metabolic dysfunction, and oxidative stress — one of the most common things they reach for in the evening, particularly to unwind, to sleep, to take the edge off, is alcohol.
And alcohol is gasoline.
This is not a temperance lecture. It is a biochemistry one.
Alcohol is processed by the liver as a priority toxin — everything else, including fat metabolism and glucose regulation, is paused while the liver deals with it. Blood sugar spikes and then crashes as the liver’s gluconeogenic function is impaired. Cortisol rises. Sleep architecture is disrupted — the restorative deep and REM sleep that metabolic repair depends upon is suppressed, often significantly, even by moderate intake. Inflammatory markers increase. Intestinal permeability worsens, driving further systemic inflammation. And in the context of oestrogen metabolism — particularly relevant for women — alcohol impairs the liver’s ability to clear oestrogen metabolites efficiently, contributing to hormonal imbalance at exactly the stage of life when that balance is already precarious.
The fire was already burning. The drink feels like water. It is not water.
And this points to something so simple it is almost embarrassing to say aloud: many people with metabolic dysregulation are chronically, persistently, quietly dehydrated. Not dramatically — they are not collapsing in the street — but functionally under-hydrated in a way that compounds every system under pressure. Water is essential for kidney filtration, lymphatic drainage, cellular nutrient transport, and the blood viscosity that cardiovascular health depends upon. Mild dehydration raises cortisol. It impairs cognition and mood. It makes people reach for the very things — coffee, alcohol, sugary drinks — that dehydrate them further.
The body asks for water. We hand it a match.
If you are managing metabolic health — yours, or someone you care about — start with water before you start with anything else. Not as a panacea, but as the basic maintenance fluid the engine was designed to run on. Aim for pale straw-coloured urine throughout the day. Drink before you feel thirsty, because thirst is already a lagging indicator, particularly in older adults. And when you reach for the evening glass of wine, ask yourself honestly: am I relaxing, or am I pouring fuel on something that was already burning?
The Oil, the Hammerite, and the New Tyres
The good news — and there is substantial good news — is that this snowball can be slowed, stopped, and in many cases sent back up the hill.
Blood sugar regulation is the foundation. This means understanding which foods drive rapid glucose spikes and which support stable energy. It means eating in an order that slows glucose absorption — vegetables and protein before carbohydrates, not instead of them. It means building meals around fibre, healthy fats, and quality protein that slow the glucose curve rather than flatten it entirely. It means not eating in ways that keep insulin chronically elevated throughout the day.
The stress axis must be addressed. Cortisol management is not a luxury. Chronic stress in the context of metabolic dysfunction is like revving a damaged engine — it accelerates every problem. Breathwork, adequate sleep, parasympathetic activation, and managing the conditions that keep the nervous system in sustained alert are as clinically relevant as diet.
Movement is medicine, particularly resistance training. Muscle is the body’s primary glucose disposal site. Building and maintaining muscle mass — through resistance exercise — is one of the most powerful metabolic interventions available. It improves insulin sensitivity, reduces visceral adiposity, supports hormone balance, and provides the structural reserve that becomes increasingly important with age. You don’t need a gym. You need consistent, progressive load.
Sleep is non-negotiable. One night of poor sleep measurably impairs insulin sensitivity. Chronic sleep deprivation drives cortisol, suppresses anabolic hormones, increases ghrelin, reduces leptin, and dismantles virtually every intervention you are trying to make during waking hours. Sleep is where the engine is rebuilt. It cannot be skipped.
The gut matters more than most people realise. The microbiome influences glucose metabolism, inflammatory tone, hormone metabolism, and even cortisol regulation. A diet rich in diverse plant foods, fermented foods, and prebiotic fibre is not optional decoration on a healthy lifestyle. It is foundational infrastructure.
Targeted nutritional support. Magnesium is depleted by stress and chronically low in those with insulin resistance — yet it is essential for over 300 enzymatic reactions including glucose metabolism. Chromium, berberine, alpha-lipoic acid, inositol — these have genuine evidence bases in supporting insulin sensitivity. Omega-3 fatty acids reduce inflammatory tone throughout the system. Vitamin D deficiency is almost ubiquitous in metabolically compromised individuals and independently associated with insulin resistance.
The Road Ahead
The General Lee didn’t have to rust. It just needed someone who understood what it was, what it needed, and who cared enough to get underneath and do the work before the engine seized.
Neither does your body.
Blood sugar dysregulation is not destiny. It is a signal — increasingly urgent as years pass — that the body’s systems are under pressure that can be addressed. The earlier you look underneath, the more you have to work with. But even those who are further along the cascade — the ones who already have a diagnosis, already have prescriptions, already feel the rust — have far more agency than they have been led to believe.
The snowball can be stopped. The rust can be treated. The engine can be turned over again.
But only if you lift the bonnet.
Eleanor Duncan is a Nutritional Therapist and Naturopath with forty years of clinical experience in medical imaging and oncology. Her practice, Seed on Soil, supports clients in restoring the foundations of metabolic health — from the roots up.