Living with Alzheimer's disease: two journeys, one hope

I have experienced Alzheimer's disease through two people I loved deeply— my father and my mother-in-law. Although they shared the same diagnosis, their journeys could not have been more different.

My father remained physically mobile until the very end. He recognized me throughout his illness and, remarkably, his final moments reflected the kindness and grace that defined his life. At the age of 95, he was sitting at the breakfast table in his chair, having just finished his morning meal, when one of his caregivers warmly asked how his morning was going. With his characteristic charm, he looked at her and replied, "It's a beautiful start to the day by looking at your beautiful face." He then gently closed his eyes and, within moments, peacefully passed away. It was a profoundly fitting farewell for a man who spent his life finding the good in others, leaving this world with the same warmth, dignity, and generosity of spirit that had guided his life.

I often wonder whether his disease was accelerated after retiring from anesthesiology at age 81. He loved practicing medicine. It gave him purpose, intellectual stimulation, and daily human interaction. Around the same time, another important chapter of his life quietly came to an end. He had been an avid singles tennis player, playing several times a week with close friends who shared not only his love of the game but also years of camaraderie. As those friends passed away, the matches ended, and with them disappeared a meaningful source of friendship, competition, physical activity, and joy. Retirement, the loss of his tennis companions, and eventually living without a life partner represented profound changes in his daily life. While no one can say these events caused his Alzheimer's disease, they remind me how deeply purpose, social connection, and lifelong engagement may influence healthy aging. They also reinforce what growing research tells us about the importance of maintaining cognitive reserve.

My mother-in-law's journey unfolded very differently.

For nearly two years she was completely immobile, dependent on others for every aspect of daily life. Conversations became impossible. There were moments of fear, confusion, and aggression that were heartbreaking to witness. Sometimes she recognized her children or me; often she did not. What affected me most was that she never seemed at peace. She appeared trapped within a mind that no longer allowed her to understand the world around her, yet still left her vulnerable to fear and distress. Watching someone you love struggle feels like a form of torture—for them and for those who care for them. When she finally passed, there was overwhelming sadness, but also a sense of relief that her suffering had come to an end.

These were two very different faces of the same disease.

Alzheimer's research has advanced more in the past few years than in the previous several decades. The FDA recently approved a new starting dosage regimen for the subcutaneous formulation of lecanemab, used to treat early Alzheimer's disease, allowing eligible patients to begin treatment at home through self-administration or with caregiver assistance. While not a cure, this represents another important step toward making disease-modifying therapy more accessible during the earliest stages of Alzheimer's disease.

Innovation extends beyond medications; as equally important is keeping the brain active. Researchers are exploring home-based brain stimulation as a potential way to improve memory, mood, and quality of life for individuals living with early Alzheimer's disease. These approaches offer hope that future care may involve multiple strategies working together to preserve function for longer.

Perhaps the greatest opportunity, however, lies in prevention.

Increasing evidence suggests that many neurodegenerative diseases, including Alzheimer's disease, are closely linked to chronic inflammation and poor metabolic health. Although genetics undoubtedly influence an individual's risk, lifestyle choices over the course of one's life appear capable of modifying that risk. 

Encouragingly, maintaining good metabolic health may also extend protection to our brains. The landmark U.S. POINTER randomized clinical trial¹ demonstrated that a structured lifestyle program emphasizing regular physical activity, a healthy diet, weight management, and control of diabetes and hypertension can improve cognitive function in older adults at risk for decline. A diet centered on rich whole, minimally processed foods with a low glycemic load, while limiting ultra-processed foods, may further support healthy brain aging. Researchers are also exploring whether improving insulin sensitivity through GLP-1 drugs can provide additional cognitive benefits. The Alzheimer's Association's PROTECT-Cog study² is now investigating whether combining these medications with lifestyle interventions can slow cognitive decline or reduce the risk of dementia in older adults. Although definitive answers are still awaited, this research offers genuine hope that improving metabolic health may become one of our most effective strategies for preventing, or at least delaying the onset of Alzheimer's disease

Social engagement, lifelong learning, spending time outdoors, regular exercise, and even the simple ritual of enjoying two cups of coffee have all been associated with supporting neuroplasticity. This is the brain's remarkable ability to adapt, reorganize, and form new connections throughout life. While none of these interventions guarantee protection against Alzheimer's disease, together they represent practical steps that promote healthier brain aging.

As medicine continues to extend life expectancy, Alzheimer's disease will likely become an even greater public health challenge. Living longer should not simply mean adding years to life; it should mean adding healthy years to life.

For those currently caring for someone with Alzheimer's disease, know that your compassion matters, even when it feels unseen. Every act of patience and kindness preserves the dignity of the person behind the disease. 

For the rest of us, perhaps the greatest lesson is to invest in our brains, long before symptoms ever appear. The choices we make today, from how we eat, learn, connect with others and care for our overall health, may shape the resilience of our brains for years to come.

I think often of my father and my mother-in-law. Their stories remind me that Alzheimer's disease is not a single illness with one experience, but countless individual journeys, each uniquely challenging.

Their memories inspire me to remain hopeful that continued scientific advances, and our commitment to healthier living, will one day transform Alzheimer's disease from one of our greatest fears, into one of medicine's greatest triumphs.