Why does prevention matter?

Cognitive decline doesn't start when symptoms appear. It begins quietly, in the background, with early changes such as lipid membrane dysfunction and oxidative stress, followed by the accumulation of amyloid plaques and tau tangles, eventually leading to neurodegeneration and loss of cholinergic function. These processes can unfold over decades before any noticeable symptoms emerge.

A prevention-focused approach helps you understand your personal risk factors, address changes early while they're still modifiable, strengthen the foundations of brain health, and protect your long-term quality of life.

What is Dementia? What is Alzheimer's Disease?

Dementia is an umbrella term for a group of symptoms that affect memory, thinking, and the ability to perform everyday activities. It's not a single disease, but rather a syndrome caused by various conditions that damage the brain. Common types of dementia include Alzheimer's disease, vascular dementia, Lewy body dementia, and frontotemporal dementia. In Australia, an estimated 421,000 people are living with dementia, and this number is expected to increase significantly in coming decades.

More descriptions of the different types of dementia can be found at Dementia Australia.

Alzheimer's disease is a type of dementia first described by Dr. Alois Alzheimer in 1906. It's the most common form of dementia, accounting for 60–70% of cases worldwide.

While Alzheimer's becomes more common with age, symptoms can appear before 65 years—known as early-onset Alzheimer's. Research shows the biological changes that drive Alzheimer's often begin many years before anything becomes noticeable.

Alzheimer's is a progressive, multifactorial condition shaped by many interconnected areas of health, including inflammation, metabolism, hormones, sleep, stress, nutrient status, and environmental factors. Because these influences differ from person to person, Alzheimer's can present differently for everyone—with varying patterns, timelines, and early signs.

What is cognitive function?

Cognitive function is a dynamic system of interconnected mental processes—including memory, attention, processing speed, and executive function—that work together to help us think, learn, solve problems, and navigate daily life. Rather than a fixed state, it's constantly adapting and responding to our experiences, environment, and lifestyle choices.

Cognitive decline is a gradual reduction in mental functions such as memory, attention, executive function and decision-making. Early signs might include difficulty recalling names or appointments, trouble with physical control, or challenges with everyday tasks.

Recognising changes early gives you the opportunity to respond proactively. With evidence-based strategies and appropriate support, you can take steps to protect and maintain your cognitive health over time.

ApoE4 (apolipoprotein E4) is a genetic variant that influences how your brain processes fats (lipids) and is the strongest known genetic risk factor for late-onset Alzheimer's disease.

Understanding the gene:

Everyone inherits two copies of the APoE gene—one from each parent. The gene comes in three main variants: ApoE2 (protective), ApoE3 (neutral, most common), and ApoE4 (increases risk). Your combination of these variants affects your baseline risk, but it doesn't determine your destiny.

Approximately 25% of the general population carries at least one copy of ApoE4, and around 2-3% carry two copies. Among people who develop Alzheimer's disease, an estimated 40-50% carry at least one ApoE4 variant.

The good news? ApoE4 is epigenetic—which means its expression can be influenced and managed through lifestyle, environment, and targeted interventions, especially those that support healthy lipid metabolism.

Cognevity is informed by the Bredesen Protocol® and offers the official programme as a qualified ReCODE Coach through Apollo Health. If you are a member of Apollo Health, Cognevity will navigate the platform with you and create your personalised ReCODE report, guiding you through every step of implementation.

At the same time, Cognevity draws on insights from other leading experts in the field of cognitive health, integrating the latest evidence on lifestyle, nutrition, environment, and personalised strategies. This ensures every client receives a comprehensive, proactive, and evidence-informed pathway to protecting and strengthening their cognitive health.