Two roads diverged in a wood, and I,
I took the one less traveled by,
And that has made all the difference.
Robert Frost
Some people follow the well‐lit road. Jeremy D. Walston, MD, chose the harder one, the road less traveled, and it made all the difference. He carved a path through scientific uncertainty, disciplinary boundaries, and institutional inertia to help define modern frailty research, transform the biology of aging, and elevate the field of geriatric medicine. On June 10, 2025, he passed away at the age of 64 after a courageous battle with glioblastoma. Though his time with us was far too short, the path he forged continues forward through those he mentored, taught, and inspired.
Jeremy served as the Raymond and Anna Lublin Professor of Geriatric Medicine at Johns Hopkins University and co‐directed the Johns Hopkins Older Americans Independence Center for over 15 years. His name is now inseparable from the concept of frailty, a term he helped move from clinical intuition to operational definition. Collaborating with Dr. Linda Fried, Dr. Karen Bandeen‐Roche, and others, Jeremy co‐developed the frailty phenotype, a turning point that gave aging research a rigorous framework and a measurable focus on physiologic vulnerability.
His work did not stop at definition. Jeremy pursued the biological roots of frailty through a body of research that was anything but conventional. He investigated chronic inflammation, mitochondrial dysfunction, and molecular decline, from mice to humans, all with the goal of capturing the physiologic complexity of aging. In more recent years, he turned his attention to the emerging concept of resilience, not as the opposite of frailty, but as its dynamic counterpart. Drawing on the foundational work he helped establish in frailty science, Jeremy sought to understand how older adults respond to stressors, recover function, and maintain physiological reserve. His work laid the groundwork for resilience to be studied not only as a clinical outcome, but as a measurable biological construct, shaped by systems biology, inflammation, and repair capacity.
But Jeremy's most profound influence may be the trail he blazed for others. A dedicated mentor, he trained and guided over a hundred mentees across medicine, epidemiology, molecular biology, and engineering. He co‐directed the Biology of Healthy Aging group, led the Translational Aging Research T32 program, and personally invested in the success of each trainee, often staying behind after meetings, reviewing drafts line by line, or making phone calls on their behalf.
He had a quiet gravity, an ability to ask just the right question or offer a perspective no one else considered. He did not impose; he invited. And in doing so, he built a culture of respect, rigor, and collaboration. Even in his final months, Jeremy continued reaching out to colleagues and mentees, asking how their work was progressing, offering feedback, and connecting ideas—always thinking forward.
Outside the lab, Jeremy was a husband, father, friend, and outdoorsman (a birdwatcher, and avid biker). He treasured time with his family, the stillness of a bike ride on a back road, and the satisfaction of a problem well thought through. He led a life of focus and purpose, not flashy, but deeply impactful.
The road he took was not the easy one. But he made it passable, for others to walk, to build, to go further.
Jeremy Walston was the consummate geriatrician‐scientist. He advanced a field, mentored a generation, and modeled the kind of humility and integrity our profession needs. His journey was his own, and all the richer because of it. His absence is deeply felt—but his path continues.
Moments with Dr. Jeremy Walston. (Top left) Jeremy presenting at a symposium on frailty at the Gerontological Society of America. (Top right) Jeremy enjoying a beer in Berlin. (Bottom left) Peter Abadir and Jeremy biking through Berlin. (Bottom right) Peter Abadir and Jeremy sharing a laugh at Penn Station in Baltimore.
Author Contributions
Dr. Peter M. Abadir was solely responsible for the conception, drafting, and final approval of this article.
Disclosure
There was no external sponsor involved in the preparation, review, or approval of this article.
Conflicts of Interest
The author declares no conflicts of interest.
Abadir, P. M. 2026. “Jeremy D. Walston, MD (1961–2025): The Road He Took Made All the Difference.” Journal of the American Geriatrics Society 74, no. 2: 617–618. 10.1111/jgs.70006.