As a cognitive decline naturopath in London, I look for the specific, sometimes reversible, drivers behind a person’s presentation before assuming decline is fixed.If you’re worried about cognitive decline, early signs of dementia, or a family history of the condition, earlier support matters, because not every cause of cognitive change is irreversible, and identifying which one you’re dealing with changes what’s possible.
Few things are as frightening as watching your own memory falter, or noticing a parent’s. The embarrassment of losing a word mid-sentence in front of colleagues. The private fear of what a diagnosis might mean for your independence, or your family’s. Many people quietly stop doing things they love, driving, hosting, travelling, out of fear of what might happen, long before anyone tells them they have to. Wanting real answers now, rather than waiting to see how things progress, is exactly the right instinct.
What the evidence actually points to
Blood sugar and insulin resistance are central drivers of cognitive decline
Insulin resistance and impaired glucose regulation are strongly linked to dementia risk, and some researchers describe Alzheimer’s disease as having a metabolic dimension similar to diabetes. Blood sugar regulation is often more relevant to your risk than cholesterol.
Inflammation is a consistent driver
Chronic low-grade inflammation is implicated across most neurodegenerative conditions, and addressing it is often more actionable than addressing genetic risk.
Autoimmunity has a real, evidenced role in cognitive decline, particularly Parkinson’s
Looking at Parkinson’s as an example, research, including a landmark 2017 Nature paper, has shown that T cells in people with Parkinson’s disease recognise and react to alpha-synuclein, the protein that aggregates in the condition, supporting an autoimmune component. This is separate from the general inflammation seen in most neurodegenerative disease, it’s a specific, targeted immune response, and it opens different lines of investigation for Parkinson’s specifically.
Traumatic brain injury that isn’t properly assessed at the time carries a real long-term cost
Moderate to severe TBI increases dementia risk in a dose-dependent way, one large study of nearly 2.8 million people found dementia risk was 24% higher after any TBI, 35% higher after a single severe TBI, and 17% higher even after a single mild TBI or concussion. Repeated mild TBIs carry their own separate risk for chronic traumatic encephalopathy. Proper assessment and treatment at the time of injury, rather than being told to simply rest and wait, is one of the few points where this risk can actually be intervened on.
Mould and mycotoxin exposure is a driver of cognitive symptoms
Mould and mycotoxin exposure is a real, often overlooked driver of cognitive decline. Research on mould-exposed patients has found measurable cognitive impairment, comparable to mild traumatic brain injury, backed by objective QEEG brain scans. The mechanism runs through neuroinflammation and reduced hippocampal neurogenesis, the same pathway implicated in several other drivers on this page. Removing the exposure is often where recovery genuinely begins, which is why environmental history is part of how I assess unexplained cognitive decline.
Oral health is more connected to brain health than most people realise
Porphyromonas gingivalis, the bacterium behind chronic gum disease, has been found directly in the brains of Alzheimer’s patients, alongside its toxic proteases, gingipains, at levels that correlate with the disease’s hallmark protein tangles. In animal studies, oral infection with this bacterium leads to brain colonisation and increased production of the amyloid protein central to Alzheimer’s pathology. This is one of the clearer, most mechanistic links between oral and gut microbiome health and brain health, which is why I assess oral and digestive health as part of a complete cognitive decline picture, not as an afterthought.Environmental toxins have a real evidence base
Environmental toxins have a real evidence base
The evidence for specific pesticides, paraquat and rotenone in particular, causing dopaminergic neuron damage and increasing Parkinson’s risk specifically is genuinely strong, replicated across epidemiological and laboratory studies. Heavy metals exposure is linked to neurotoxic effects on cognition. The mechanisms across these exposures, oxidative stress, mitochondrial dysfunction, neuroinflammation, overlap significantly with the other drivers on this page, which is exactly why I look at toxic burden as part of a complete case rather than in isolation.
Where I see people get this wrong
The first mistake is treating cholesterol as the main lever for brain health and cause of Alzheimer’s disease, when blood sugar regulation, immune dysregulation and inflammation are doing more of the work in most cases.
The second is not properly assessing and managing a TBI at the time it happens, being told there’s nothing to do beyond symptom management closes the door on the window where intervention may matter most.
The third is treating cognitive decline as one condition with one cause, rather than investigating which combination of metabolic, inflammatory, autoimmune, traumatic or toxic drivers is actually present in this particular case.
How I work with cognitive decline
I look for the underlying drivers, deficiencies, infections, hormonal or metabolic factors, sleep disorders, medication effects, toxic burden, or an autoimmune component, using detailed testing and history. Where appropriate, I incorporate elements of the Bredesen approach, personalised, multi-domain intervention targeting your specific contributing factors, alongside dietary and lifestyle changes. I’ll always be clear about what the evidence currently supports for your specific presentation, rather than offering a blanket guarantee. I
If this sounds like where you are, apply for a 15 minute consultation, in person or online, and let’s work out the best way forward.
