You eat reasonably well. You’re not diabetic. Your last blood test came back “normal.” And yet something still feels off the energy dips, the brain fog, the sense that your body isn’t quite keeping up the way it used to.
What if the missing piece isn’t a dramatic diagnosis, but something far more subtle, something happening at a cellular level every single time you eat?
The quiet force shaping how you age
Most of us associate blood sugar with diabetes and little else. But in functional medicine, blood glucose regulation is understood to be one of the most foundational drivers of long-term health, not just for those with a diagnosis, but for all of us.
Every meal triggers a glucose and insulin response in your body. Do that thousands of times over decades with consistently dysregulated blood sugar, and the cumulative effect on your cells, your brain, and your organs is profound. This isn’t a future problem. It’s a pattern being written right now, with every plate of food.
Why dementia is now being called “Type 3 Diabetes”
One of the most striking developments in neuroscience over the past decade is the understanding that Alzheimer’s disease has a strong blood glucose component. In growing clinical circles, it is now referred to as Type 3 Diabetes, a condition in which the brain loses its ability to respond to insulin effectively, accelerating the kind of cognitive decline we once thought was simply an inevitable part of ageing.
But here is what makes this reframing genuinely hopeful, not frightening: if metabolic dysfunction is a root driver of cognitive decline, then addressing that dysfunction becomes a powerful clinical lever.
This is precisely the foundation of the Bredesen Protocol, a pioneering, multi-modal programme developed by Dr Dale Bredesen, Professor of Neurology at UCLA. Unlike conventional approaches that focus on managing symptoms, the Bredesen Protocol identifies and targets the underlying metabolic, inflammatory, and lifestyle factors driving neurodegeneration. Published in peer-reviewed journals including Aging, the protocol has documented cases of patients reversing mild to moderate cognitive decline outcomes that conventional medicine long considered impossible.
At the London Clinic of Nutrition, our practitioners are trained in the Bredesen Protocol. We have seen first-hand what becomes possible when the root causes are properly identified and addressed, and blood sugar regulation sits at the very centre of that work.
Why the same diet affects two people so differently
Here is where it gets particularly interesting and where personalised, functional medicine truly earns its place.
Two people can eat an identical meal and have completely different blood sugar responses. Not because of willpower, metabolism myths, or how much they exercised that morning but because of the diversity of their gut microbiome. The trillions of bacteria living in your digestive system play a direct role in how your body handles carbohydrates. Someone with a rich, diverse microbiome may process the same bowl of food with steady glucose control. Someone with compromised microbiome diversity may experience a significant spike and over time, those spikes accumulate into something far more serious.
This is why there is no universal blood sugar solution. Knowing your own body through functional testing and personalised guidance is not a luxury. It is the foundation of lasting change.
The role of protein: one of the most overlooked levers
Among the many dietary factors that influence blood sugar, protein intake stands out as one of the most consistently underestimated. At the London Clinic of Nutrition, it is one of the first things our practitioners examine because optimising protein can have a meaningful stabilising effect on glucose and insulin responses throughout the day.
This isn’t about following a high-protein trend. It’s about understanding the right amount and the right balance for your unique physiology, something that looks different for every person we work with.
You are not at the mercy of your blood sugar
The most important thing to understand is this: blood sugar dysregulation is not a life sentence, and cognitive decline is not inevitable. The science from the Bredesen Protocol’s peer-reviewed research to advances in microbiome mapping is making one thing increasingly clear: the body has a remarkable capacity to recalibrate when it is given the right support, the right information, and a truly personalised approach.
Healthy ageing is not a matter of luck. It is a matter of understanding and that understanding begins with knowing what is actually happening inside your body.
If any of this resonates whether you’re navigating early cognitive concerns, unexplained fatigue, or simply want to understand how your body is ageing, we’d love to have a conversation. Our practitioners are trained in the Bredesen Protocol and take a deeply personalised approach to every patient.
Book your Functional Medicine Discovery Call today.
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Let’s uncover the story your body’s been trying to tell.
Author Oliver Barnett