Alzheimer’s disease was always thought of as a disease that affected only those in their old age. It is typical to see a person getting diagnosed with the disease in their 70s, 80s, or 90s. Back in the day the disease was referred to as either “senility or presenile dementia.”

But today, science challenges this long-held view. Now we have studies that analyze PET scans and spinal fluid that reveal the changes characteristic to Alzheimer’s disease. These changes can be observed at least 15 to 20 years before the diagnosis. Some changes even present themselves in a person’s 20’s and 30’s. Just like there is pre-diabetes that precedes diabetes for years, the same goes for Alzheimer’s disease. Pre-Alzheimer’s disease will precede the actual dementia phase of Alzheimer’s disease many years prior to the actual diagnosis.

This discovery opens the door to a profound and unsettling question: Could the seeds of Alzheimer’s be planted from birth?

Early Beginnings of Cognitive Vulnerability

As the underlying causes of cognitive decline are being studied, it appears that the starting point of the seeds of Alzheimer’s are often planted from birth. With this said, it becomes an opportunity for us to control some aspect of being at risk for the disease and perhaps even prevent the disease altogether.

According to Robert Lustig, Ph.D.’s book Metabolical, upon being weaned from breastfeeding, babies are exposed to formula that is laden with sugar. This sugar becomes a life-long addiction and unexpected future development pursues, leading us to exposure to many preventable diseases. So unknowingly we are led to the slaughterhouse with a future of insulin resistance, gut viruses, inflammation of the brain and body—all affecting our brain health. This cognitive deterioration starts within our first year of life!

For caregivers and those already navigating mild cognitive impairment, this perspective can feel heavy. But it also highlights an important truth: brain health is shaped not only by genetics or old age, but by the environments and choices we are exposed to from the very beginning of life.

Processed Foods, Missing Nutrients, and the Brain

From baby formula and baby food we are fed products that no longer require significant mastication or chewing but are now highly processed—referred to as processed foods. Most of these processed foods that we eat regularly are deficient in critical nutrients, are often high in sugar, subpar ingredients, and pro-inflammatory, toxic additives such as preservatives.

Instead, we develop chronic deficiencies such as zinc, potassium, magnesium, DHA, and choline. These are not “optional” nutrients; they are essential for building healthy neurons, repairing brain cells, and protecting memory over time. Without them, the brain’s defenses against aging and disease weaken.

Now include the amount of time we spend inside indoor environments that are toxic, living sedentary lifestyles, and enduring long-term stresses, and we have an open invitation for Alzheimer’s disease that has been in its gestation process from birth.

This paints a sobering picture: Alzheimer’s is not just a disease that suddenly appears late in life—it may be the result of lifelong exposures and cumulative risks that quietly shape the brain’s resilience, or lack thereof.

A Call for Awareness and Prevention

There is some good news, and that is that cognitive decline related to Alzheimer’s disease and related dementias is being slowly revealed. Though the pace of discovery is slow, and though for some people these insights may come too late, we have the ability to identify contributing factors before they create irreversible harm.

For caregivers, this means knowing that lifestyle and environment matter. For individuals in the early stages of MCI, it means recognizing that while the past cannot be changed, every healthy choice made today—nutritionally, emotionally, socially, or physically—can shape the brain’s tomorrow.

This position—that Alzheimer’s may begin as early as birth—should not drive fear, but rather deepen our resolve. If the seeds of vulnerability are planted early, then so too can the seeds of resilience. Nutrition, stress management, physical activity, and meaningful social connections are not small things; they are lifelong investments in brain health.

Final Thoughts

The thought that Alzheimer’s could have its roots in infancy forces us to see dementia not just as a disease of the old, but as the result of an entire lifetime of exposures and habits. For professionals, caregivers, and individuals living with early signs of decline, this position encourages a shift: from waiting for symptoms to appear, to cultivating prevention and resilience at every stage of life.

While we cannot rewrite the past, we can reshape the future. Awareness, early action, and compassion—for ourselves and for those we care for—remain our most powerful tools in the face of this complex disease.

Practical Takeaways for Brain Health

If Alzheimer’s may begin decades earlier than symptoms appear, what can you do today? Here are four practical steps caregivers and individuals with MCI can put into action:

1.     Prioritize whole foods – Incorporate more fruits, vegetables, nuts, fish, and lean proteins into your diet, while reducing processed, sugary, and additive-heavy foods.

2.     Keep moving – Engage in regular physical activity, even gentle walking or stretching, to improve blood flow and reduce inflammation.

3.     Manage stress – Explore mindfulness, prayer, journaling, or supportive groups to buffer the harmful effects of chronic stress.

4.     Nourish connection – Social engagement and meaningful activities stimulate the brain and protect against decline.