Zenith Within by Sara Redondo, MD, MS

Zenith Within by Sara Redondo, MD, MS

Protect Your Brain from Stroke, Dementia & Depression

Discover 3 science-backed habits that protect brain health and reduce shared risks for stroke, dementia, and late-life depression.

Sara Redondo, MD, MS's avatar
Sara Redondo, MD, MS
May 03, 2026
∙ Paid

In modern medicine, we often treat the brain like a collection of unrelated departments.

If you are concerned about a stroke, you see a vascular specialist. If you struggle with depression, you seek a psychiatrist. If you notice memory slips, you consult a neurologist. We have siloed these conditions as if they are separate storms happening in different skies.

But what if they are actually branches of the very same tree?

A monumental “review of reviews” recently synthesized data from 182 different meta-analyses to determine if these three conditions—stroke, dementia, and late-life depression—share a common origin. The results were a paradigm shift for preventative medicine. Researchers found that these “Big Three” aren’t just related; they are fueled by the exact same metabolic and lifestyle “root causes.”

Instead of playing a game of medical “whack-a-mole”—treating each symptom as it pops up—we can now deploy a unified defense. There are three specific habits that the data identifies as “Universal Protectants.” They act as a biological shield against all three simultaneously.

The question is: Are you optimizing the right ones?

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