Uploaded July 2026 | Updated September 2026, 3 weeks ago
Can we protect our brains as we age—and even reduce the risk of dementia?
In Episode 2 of The Vitals Health Span miniseries, guest host Dr. Shruti Naik explores the science of Brain Span with neurologist Dr. Fanny Elahi, neuroscientist Dr. Joseph Castellano, and geneticist Dr. Alison Goate.
Together, they discuss what distinguishes normal brain aging from the earliest signs of cognitive decline, how genetics and lifestyle work together to shape brain health, and why resilience—not just disease—is becoming one of the biggest frontiers in neuroscience. The conversation also explores Alzheimer's biomarkers, cognitive reserve, environmental influences, and how the XPRIZE Healthspan Challenge is helping researchers measure brain health decades before symptoms appear.
Watch Episode 2 of our HealthSpan miniseries to learn how scientists are working to preserve memory, cognition, and independence throughout life.
00:00 – Introduction: What is Brain Span?
01:00 – Normal brain aging vs. early cognitive decline
03:05 – When should memory changes become a concern?
05:15 – Early warning signs beyond memory loss
07:40 – Why everyone ages differently
08:35 – Lifestyle changes that protect the brain
10:05 – What is cognitive reserve?
12:10 – Why some brains resist Alzheimer's disease
13:30 – How the rest of your body influences your brain
20:05 – Why genes are not destiny
22:10 – Treating aging before disease develops
23:10 – Supplements vs. evidence-based medicine
25:15 – Environmental factors affecting brain health
28:05 – Inside the XPRIZE Healthspan brain study
30:00 – Blood tests that may detect Alzheimer's decades early
31:25 – Are brain supplements worth taking?
34:05 – How to spot real scientific breakthroughs
40:20 – Does coffee improve brain health?
42:00 – Bottom line: Building a healthier Brain Span
Can we protect our brains as we age—and even reduce the risk of dementia?
In Episode 2 of The Vitals Health Span miniseries, guest host Dr. Shruti Naik explores the science of Brain Span with neurologist Dr. Fanny Elahi, neuroscientist Dr. Joseph Castellano, and geneticist Dr. Alison Goate.
Together, they discuss what distinguishes normal brain aging from the earliest signs of cognitive decline, how genetics and lifestyle work together to shape brain health, and why resilience—not just disease—is becoming one of the biggest frontiers in neuroscience. The conversation also explores Alzheimer's biomarkers, cognitive reserve, environmental influences, and how the XPRIZE Healthspan Challenge is helping researchers measure brain health decades before symptoms appear.
Watch Episode 2 of our HealthSpan miniseries to learn how scientists are working to preserve memory, cognition, and independence throughout life.
00:00 – Introduction: What is Brain Span?
01:00 – Normal brain aging vs. early cognitive decline
03:05 – When should memory changes become a concern?
05:15 – Early warning signs beyond memory loss
07:40 – Why everyone ages differently
08:35 – Lifestyle changes that protect the brain
10:05 – What is cognitive reserve?
12:10 – Why some brains resist Alzheimer's disease
13:30 – How the rest of your body influences your brain
20:05 – Why genes are not destiny
22:10 – Treating aging before disease develops
23:10 – Supplements vs. evidence-based medicine
25:15 – Environmental factors affecting brain health
28:05 – Inside the XPRIZE Healthspan brain study
30:00 – Blood tests that may detect Alzheimer's decades early
31:25 – Are brain supplements worth taking?
34:05 – How to spot real scientific breakthroughs
40:20 – Does coffee improve brain health?
42:00 – Bottom line: Building a healthier Brain Span
