Zenith Within | Sara Redondo, MD

Zenith Within | Sara Redondo, MD

How I Went from Zero Subscribers to Viral Notes Writer and Substack Health Bestseller — And How You Can Too

The Viral Substack System That Actually Works

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Sara Redondo, MD
and
Kristina God
Sep 02, 2025
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When I joined

Kristina God
‘s Substack Notes Kickstarter Bootcamp earlier this year, I was a medical doctor trying to figure out how to actually build an audience on Substack.

I had zero followers, zero subscribers. No strategy. Just a lot of health knowledge I wanted to share — and no clue how to get it in front of people.

In just one week, that changed.

By the end of…

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